SC56D CX06827 CX20437 101098E 101098D 101098C 101098B 10ECTM 42/MNP - Datasheet Archive

 

V.92/V.90 CX06827 Single Chip ACF Modem with Optional CX20437 Voice Codec Data Sheet Doc. No. 101098E March 26, 2002 SC56D Single

 

SC56D SC56D Modem V.92/V.90 CX06827 CX06827 Single Chip ACF Modem with Optional CX20437 CX20437 Voice Codec Data Sheet Doc. No. 101098E 101098E March 26, 2002 SC56D SC56D Single Chip ACF Modem Data Sheet Revision Record Revision E D C B A Date 3/26/2002 3/15/2001 10/26/2000 9/6/2000 6/26/2000 Comments Revision E release. Supersedes 101098D 101098D. Revision D release. Supersedes 101098C 101098C. Revision C release. Supersedes 101098B 101098B. Revision B release. Supersedes 101098A. Initial release. © 2000, 2001, 2002 Conexant Systems, Inc. All Rights Reserved. Information in this document is provided in connection with Conexant Systems, Inc. ("Conexant") products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice. Conexant makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to its specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Conexant's Terms and Conditions of Sale for such products, Conexant assumes no liability whatsoever. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. CONEXANT FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS. Conexant products are not intended for use in medical, lifesaving or life sustaining applications. Conexant customers using or selling Conexant products for use in such applications do so at their own risk and agree to fully indemnify Conexant for any damages resulting from such improper use or sale. The following are trademarks of Conexant Systems, Inc.: ConexantTM, the Conexant C symbol, and "What's Next in Communications Technologies"TM. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. For additional disclaimer information, please consult Conexant's Legal Information posted at www.conexant.com, which is incorporated by reference. Reader Response: Conexant strives to produce quality documentation and welcomes your feedback. Please send comments and suggestions to tech.pubs@conexant.com. For technical questions, contact your local Conexant sales office or field applications engineer. ii Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet Contents Revision History . viii 1. Introduction . 1-1 1.1 1.2 1.3 Overview .1-1 Features .1-5 1.2.1 General Modem Features .1-5 1.2.2 Applications.1-6 Technical Overview.1-7 1.3.1 General Description .1-7 1.3.2 MCU Firmware.1-7 1.3.3 Operating Modes .1-8 1.3.3.1 Data/Fax Modes .1-8 1.3.3.2 V.44 Data Compression .1-8 1.3.3.3 Synchronous Access Mode (SAM) - Video Conferencing .1-9 1.3.3.4 1.4 1.5 Worldwide Operation .1-9 1.3.3.5 TAM Mode .1-9 1.3.3.6 Voice/Speakerphone Mode (S Models) .1-10 1.3.4 Reference Design .1-10 1.3.5 GSM (Parallel Host Interface) .1-10 Hardware Description.1-11 1.4.1 CX06827 CX06827 Modem Controller and DSP.1-11 1.4.2 CX20437 CX20437 Voice Codec .1-11 Commands.1-11 2. Technical Specifications . 2-1 2.1 2.2 2.3 2.4 101098E 101098E Serial DTE Interface Operation.2-1 2.1.1 Automatic Speed/Format Sensing.2-1 Parallel Host Bus Interface Operation .2-2 Establishing Data Modem Connections.2-2 2.3.1 Telephone Number Directory .2-2 2.3.2 Dialing .2-2 2.3.3 Modem Handshaking Protocol.2-2 2.3.4 Call Progress Tone Detection.2-2 2.3.5 Answer Tone Detection.2-2 2.3.6 Ring Detection.2-3 2.3.7 Billing Protection .2-3 2.3.8 Connection Speeds.2-3 2.3.9 Automode.2-3 Data Mode.2-4 Conexant iii SC56D SC56D Single Chip ACF Modem Data Sheet 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.4.1 Speed Buffering (Normal Mode) .2-4 2.4.2 Flow Control .2-4 2.4.3 Escape Sequence Detection .2-4 2.4.4 BREAK Detection .2-4 2.4.5 Telephone Line Monitoring .2-4 2.4.6 Fall Forward/Fallback (V.92/V.90/V.34/V.32 bis/V.32) .2-4 2.4.7 Retrain.2-5 2.4.8 Programmable Inactivity Timer.2-5 2.4.9 DTE Signal Monitoring (Serial DTE Interface Only) .2-5 Modem-on-Hold.2-5 Error Correction and Data Compression .2-6 2.6.1 V.42 Error Correction.2-6 2.6.2 MNP 2-4 Error Correction.2-6 2.6.3 V.44 Data Compression .2-6 2.6.4 V.42 bis Data Compression .2-6 2.6.5 MNP 5 Data Compression .2-6 MNP 10 Data Throughput Enhancement.2-7 MNP 10ECTM 10ECTM Enhanced Cellular Connection.2-7 Fax Class 1 and Fax Class 1.0 Operation.2-7 Voice/Audio Mode .2-7 2.10.1 Online Voice Command Mode.2-8 2.10.2 Voice Receive Mode .2-8 2.10.3 Voice Transmit Mode.2-8 2.10.4 Full-Duplex Receive and Transmit Mode.2-8 2.10.5 Audio Mode .2-9 2.10.6 Tone Detectors .2-9 2.10.7 Speakerphone Modes .2-9 Full-Duplex Speakerphone (FDSP) Mode (S Model) .2-9 Caller ID .2-9 Worldwide Country Support .2-9 Diagnostics .2-10 2.14.1 Commanded Tests.2-10 2.14.2 Power On Reset Tests .2-11 Low Power Sleep Mode.2-11 GSM Operation.2-11 3. Hardware Interface . 3-1 3.1 3.2 3.3 3.4 3.5 3.6 CX06827 CX06827 ACF Hardware Pins and Signals .3-1 3.1.1 CX06827 CX06827 ACF Interface Signals .3-1 CX20437 CX20437 VC Hardware Pins and Signals (S Model).3-22 Electrical and Environmental Specifications.3-28 Operating Conditions, Absolute Maximum Ratings, and Power Requirements.3-28 Interface and Timing Waveforms.3-30 3.5.1 External Memory Bus Timing.3-30 3.5.2 Parallel Host Bus Timing .3-32 3.5.3 Serial DTE Interface .3-34 Crystal Specifications .3-35 4. Package Dimensions. 4-1 5. Parallel Host Interface. 5-1 iv Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 5.1 5.2 5.3 5.4 101098E 101098E Overview .5-1 Register Signal Definitions .5-3 5.2.1 IER - Interrupt Enable Register (Addr = 1, DLAB = 0) .5-3 5.2.2 FCR - FIFO Control Register (Addr = 2, Write Only) .5-4 5.2.3 IIR - Interrupt Identifier Register (Addr = 2).5-5 5.2.4 LCR - Line Control Register (Addr = 3) .5-6 5.2.5 MCR - Modem Control Register (Addr = 4).5-7 5.2.6 LSR - Line Status Register (Addr = 5).5-7 5.2.7 MSR - Modem Status Register (Addr = 6) .5-9 5.2.8 RBR - RX Buffer (Receiver Buffer Register) (Addr = 0, DLAB = 0) .5-9 5.2.9 THR - TX Buffer (Transmitter Holding Register) (Addr = 0, DLAB = 0).5-9 5.2.10 Divisor Registers (Addr = 0 and 1, DLAB = 1).5-10 5.2.11 SCR - Scratch Register (Addr = 7).5-10 Receiver FIFO Interrupt Operation .5-10 5.3.1 Receiver Data Available Interrupt .5-10 5.3.2 Receiver Character Timeout Interrupts .5-11 Transmitter FIFO Interrupt Operation.5-11 5.4.1 Transmitter Empty Interrupt .5-11 Conexant v SC56D SC56D Single Chip ACF Modem Data Sheet Figures Figure 1-1. CX06827 CX06827 ACF Modem Simplified Interface Diagram .1-3 Figure 1-2. CX06827 CX06827 ACF Modem Major Interfaces .1-4 Figure 3-1. CX06827 CX06827 ACF Hardware Signals for Parallel Interface (PARIF = High) .3-2 Figure 3-2. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Parallel Interface (PARIF = High).3-3 Figure 3-3. CX06827 CX06827 ACF Hardware Signals for Serial Interface (PARIF = Low).3-11 Figure 3-4. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Serial Interface (PARIF = Low).3-12 Figure 3-5. CX20437 CX20437 VC Hardware Interface Signals .3-23 Figure 3-6. CX20437 CX20437 VC 32-Pin TQFP Pin Signals .3-23 Figure 3-7. Waveforms - External Memory Bus .3-31 Figure 3-8. Waveforms - Parallel Host Bus .3-33 Figure 3-9. Waveforms - Serial DTE Interface .3-34 Figure 4-1. Package Dimensions - 144-Pin TQFP.4-1 Figure 4-2. Package Dimensions - 32-pin TQFP.4-2 vi Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet Tables Table 1-1. CX06827 CX06827 ACF Modem Models and Functions.1-3 Table 1-2. Default Supported Countries .1-9 Table 2-1. +MS Command Automode Connectivity.2-3 Table 3-1. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Parallel Interface (PARIF = High).3-4 Table 3-3. CX06827 CX06827 ACF Pin Signal Definitions for Parallel Interface (PARIF = High).3-6 Table 3-2. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Serial Interface (PARIF = Low) .3-13 Table 3-3. CX06827 CX06827 ACF Pin Signal Definitions for Serial Interface (PARIF = Low).3-15 Table 3-4. CX06827 CX06827 ACF I/O Type Definitions .3-21 Table 3-5. CX06827 CX06827 ACF DC Electrical Characteristics .3-21 Table 3-6. CX20437 CX20437 VC 32-Pin TQFP Pin Signals .3-24 Table 3-7. CX20437 CX20437 VC Pin Signal Definitions .3-25 Table 3-8. CX20437 CX20437 VC DC Electrical Characteristics.3-27 Table 3-9. CX20437 CX20437 VC Analog Electrical Characteristics.3-27 Table 3-10. Operating Conditions .3-28 Table 3-11. Absolute Maximum Ratings .3-28 Table 3-12. Current and Power Requirements .3-29 Table 3-13. Timing - External Memory Bus.3-30 Table 3-14. Timing - Parallel Host Bus.3-32 Table 3-15. Crystal Specifications.3-35 Table 5-1. Parallel Interface Registers .5-2 Table 5-2. Interrupt Sources and Reset Control .5-5 Table 5-3. Programmable Baud Rates .5-10 101098E 101098E Conexant vii SC56D SC56D Single Chip ACF Modem Data Sheet Revision History Changes Incorporated in Doc. No. 101098E 101098E 1. Section 1.1: Added introduction to support for optional direct connect to an AMPS analog cellular phone and, for parallel host interface model, support for direct connect to a GSM phone. 2. Section 1.2.1: Added features for optional direct connect to an AMPS analog cellular phone, direct connect to a GSM phone (parallel host interface model), and fax class 2 commands. Revised serial maximum rate to 115.2 kbps. 3. Section 1.3.1: Added description for support for optional direct connect to an AMPS analog cellular phone and, for parallel host interface model, support for direct connect to a GSM phone. 4. Section 1.3.2: Added fax class 2 support. 5. Section 1.3.3.1: Added fax class 2 support. 6. Section 1.3.5: Added GSM supported features 7. Section 1.4: Added hardware descriptions for support or optional direct connect to an AMPS analog cellular phone and, for parallel host interface model, support for direct connect to a GSM phone. 8. Section 1.5: Added fax class 2 command support. 9. Section 2.1.1: Revised serial maximum rate to 115.2 kbps. 10. Section 2.4.5: Deleted Receive and Send Space Disconnect. 11. Section 2.6.3: Deleted V.44 parameter descriptions. 12. Section 2.10: Added Full-Duplex Receive and Transmit Mode to introductory text. 13. Section 2.13: Added Type I and Type II Caller ID support. 14. Section 2.16: Added GSM Operation description. 15. Section 3, throughout: Added interface signal descriptions for optional direct connect to an AMPS analog cellular phone and, for parallel host interface model, direct connect to a GSM phone. 16. Table 3-15: Revised timing values. Changes Incorporated in Doc. No. 101098D 101098D 1. 2. Throughout: Added V.92, added V.44, added Call Waiting Caller ID Detect, and deleted K56flex functions 3. Figure 3-1: Added VOICE# and EXTOH# signals, swapped MIC_IN and LINE_IN signals. 4. Figure 3-2: Added VOICE# and EXTOH# signals. 5. Table 3-1: Added VOICE# and EXTOH# signals, swapped MIC_IN and LINE_IN signals. 6. viii Throughout: reformatted. Figure 3-3: Added VOICE# and EXTOH# signals, swapped MIC_IN and LINE_IN signals. Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 7. Figure 3-4: Added VOICE# and EXTOH# signals. 8. Table 3-2: Added VOICE# and EXTOH# signals, swapped MIC_IN and LINE_IN signals. 9. Table 3-3: Added VOICE# and EXTOH# signals, swapped MIC_IN and LINE_IN signals. Changes Incorporated in Doc. No. 101098C 101098C 1. Section 1.2.1: Added power values. 2. Table 3-12: Added power values. Changes Incorporated in Doc. No. 101098B 101098B Throughout: Reformatted. 101098E 101098E Conexant ix SC56D SC56D Single Chip ACF Modem Data Sheet This page is intentionally blank. x Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 1. Introduction 1.1 Overview The Conexantä SC56D SC56D V.92/V.90 Single Chip ACF Modem supports V.92 and V.90 analog data modem operation with V.44 data compression and supports 14.4 kbps fax modem operation. In addition, the modem supports remote TAM, speakerphone (optional), and parallel/serial host interface operation depending on model. Table 1-1 lists the available models. A simplified device interface drawing is shown in Figure 1-1. A functional interface drawing showing supporting memory is shown in Figure 1-2. The modem operates with PSTN telephone lines worldwide and supports optional direct connect to an AMPS analog cellular phone. The parallel host interface model also supports direct connect to a GSM phone. The CX06827 CX06827 ACF device integrates modem controller (MCU), modem data pump (MDP), bootloader ROM, and analog line interface codec functions into a single 144-pin TQFP. The modem operates by executing firmware from external flash ROM and RAM. Customized modem firmware and added/modified country profiles can also be executed from external memory, either from flash ROM or from serial EEPROM/flash ROM and RAM. In V.92/V.90 (SC56 models) data mode, the modem can receive data at speeds up to 56 kbps from a digitally connected V.92/V.90-compatible central site modem. A V.92/V.90 modem takes advantage of the PSTN which is primarily digital except for the client modem to central office local loop and are ideal for applications such as remote access to an Internet Service Provider (ISP), on-line service, or corporate site. In this mode, the modem can transmit data at speeds up to 48 kbps in V.92 or up to V.34 rates in V.90. In V.34 data mode (SC56 and SC33 models), the modem operates at line speeds up to 33.6 kbps. In V.32 bis data mode, the modem operates at lines speeds up to 14.4 kbps. Data compression (V.44/V.42 bis/MNP 5) and error correction (V.42/MNP 42/MNP 2-4) modes are supported to maximize data throughput and data transfer integrity. V.44 is a more efficient data compression than V.42 bis that significantly increases downstream throughput thus reducing the download time for the types of files associated with Internet use, such as Web pages and uncompressed files such as graphics, image, audio, and document files. V.44 data compression can achieve compression rates of more than 25% over V.42bis. Typical compression ratio for V.44 on Web type data is approximately 6-1 resulting in overall effective data throughput rate up to 300 kbps for a 56 kbps connection. Non-error-correcting mode is also supported. In V.22 bis fast connect mode, the modem can connect at 2400 bps with a very short training time, which is very efficient for small data transfers. Fax Group 3 send and receive rates are supported up to 14.4 kbps with T.30 protocol. Downloadable architecture supports downloading of updated/upgraded or customized MCU firmware and MDP code modules from the host/DTE to the CX06827 CX06827 ACF. 101098E 101098E Conexant 1-1 SC56D SC56D Single Chip ACF Modem Data Sheet V.80 synchronous access mode supports host-controlled communication protocols, e. g., H.324 video conferencing. In TAM mode, enhanced 2-bit or 4-bit per sample coding schemes at 8 kHz sample rate provide flexible format compatibility and allows efficient digital storage of voice/audio. Also supported are 8-bit linear and IMA 4-bit ADPCM coding. This mode supports applications such as digital telephone answering machine (TAM), voice annotation, and recording from and playback to the telephone line. S models, using the optional CX20437 CX20437 Voice Codec (VC) in a 32-pin TQFP, support position independent, full-duplex speakerphone (FDSP) operation using microphone and speaker, as well as other voice/TAM applications using handset or headset. S models can also support analog cellular operation with direct connection to an analog cellular phone (in lieu of a telephone handset/headset connection). GSM operation supports data services offered by the Global System for Mobile Communications network: data transmissions to PSTN, ISDN or GSM users. GSM data operation allows data and fax transfer, and connection to videotex. Analog cellular and GSM direct connect operation is supported by licensed firmware for specific phone types. This data sheet describes the modem capabilities. Commands and parameters are defined in the Commands Reference Manual (Doc. No. 100722). 1-2 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet Table 1-1. CX06827 CX06827 ACF Modem Models and Functions Model/Order/Part Numbers Marketing Name Supported Functions Device Set Order No. Single Chip ACF Modem [144-Pin TQFP] Part No. Voice Codec (VC) [32-Pin TQFP] Part No. V.34 Data, V.32 bis Data, V.44 Data Compression, V.17 Fax, TAM Voice/FDSP DS56-L147-021 DS56-L147-021 CX06827-11 CX06827-11 - DS56-L147-031 DS56-L147-031 CX06827-11 CX06827-11 20437-11 Y Y Y - Y Y Y DS28-L147-021 DS28-L147-021 CX06827-13 CX06827-13 Y - - Y Y - DS28-L147-031 DS28-L147-031 DS96-L147-021 DS96-L147-021 CX06827-13 CX06827-13 20437-11 - Y Y Y CX06827-14 CX06827-14 - - - Y - DS96-L147-031 DS96-L147-031 CX06827-14 CX06827-14 20437-11 - - Y Y V.92/V.90 Data EMBEDDED APPLICATIONS SC56D SC56D SC56D/S SC56D/S SC336D SC336D SC336D/S SC336D/S SC144D SC144D SC144D/S SC144D/S AFTERMARKET APPLICATIONS SC56D SC56D SC56D/S SC56D/S DS56-L144-301 DS56-L144-301 CX06827-11 CX06827-11 - Y Y Y - DS56-L144-311 DS56-L144-311 CX06827-11 CX06827-11 20437-11 Y Y Y Y Notes: 1. Model options: S 56 33 14 Voice/full-duplex speakerphone (FDSP) and analog cellular 56 kbps max. rate per V.90 33.6 kbps max. rate per V.34 14.4 kbps max. rate per V.32 bis. 2. Supported functions (Y = Supported; - = Not supported): TAM FDSP Telephone answering machine (Voice playback and record through telephone line) Full-duplex speakerphone and voice playback and record through telephone line, handset, and mic/speaker. 3. For ordering purposes, the CX prefix may not be included in the part number for some devices. Also, the CX prefix may not appear in the part number as branded on some devices. Figure 1-1. CX06827 CX06827 ACF Modem Simplified Interface Diagram PARALLEL HOST BUS OR SERIAL DTE INTERFACE CX06827 CX06827 Single Chip ACF Modem 144-Pin TQFP Telephone Line Interface Discrete Components CX20437 CX20437 Voice Codec (VC) 32-Pin TQFP (Optional) TIP RING TIP RING TELEPHONE LINE HANDSET (OPTIONAL) MIC SPEAKER (OPTIONAL) 101098_001 101098E 101098E Conexant 1-3 SC56D SC56D Single Chip ACF Modem Data Sheet Figure 1-2. CX06827 CX06827 ACF Modem Major Interfaces DAA Hardware CX06827 CX06827 Single Chip ACF Modem 144-Pin TQFP Telephone Line Interface Discrete Components Line Interface Codec Voice Relay, HS Pickup Detector (Optional) Parallel Host or Serial DTE Interface Microcontroller Unit (MCU) Modem Data Pump (MDP) CX20437 CX20437 Voice Codec (VC) 32-Pin TQ FP (Optional) TELEPHONE LINE TIP RING TELEPHONE HANDSET TIP RING HS Hybrid Components (Optional) MIC SPEAKER Digital Speaker Circuit (Optional) Bootloader ROM (Mic/Speaker) Interface (Optional) SOUNDUCER Serial EEPROM 2K (256 x 8) to 256K (32K x 8) (Optional) RAM 1M (128K x 8) Flash ROM 2M (256K x 8) 101098_002 1-4 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 1.2 Features 1.2.1 General Modem Features · · · · · · · · · · · · · · 101098E 101098E Data modem - ITU-T V.92 (SC56 models) with PCM upstream rates up to 48 kbps, QuickConnect, and Modem-on-hold functions - V.90 (SC56 models), V.34 (SC56 and SC33 models), V.32bis, V.32, V.22 bis, V.22, V.23, and V.21; Bell 212A and Bell 103 - MNP 10ECTM 10ECTM enhanced cellular performance - V.250 and V.251 commands - V.22 bis fast connect Analog cellular direct connect using optional CX20437 CX20437 Voice Codec (S models) GSM cellular direct connect (parallel interface only) Data compression and error correction - V.44 data compression for optimal downloading of Internet Web pages and files - V.42 bis and MNP 5 data compression - V.42 LAPM and MNP 2-4 error correction Fax modem - V.17, V.29, V.27 ter, and V.21 channel 2 - EIA/TIA 578 Class 1 and T.31 Class 1.0, and EIA/TIA 578 Class 2 commands V.80 synchronous access mode supports host-controlled communication protocols with H.324 interface support Interfaces to external flash ROM, RAM, and optional serial EEPROM Downloadable Architecture - Downloadable MCU firmware from the host/DTE to flash ROM - Downloadable MDP code modules from the MCU transparent to the host Data/Fax/Voice call discrimination Hardware-based modem controller and digital signal processor (DSP) Worldwide operation - Complies to TBR21 TBR21 and other country requirements - Caller ID detection - Call progress, blacklisting - External flash ROM includes default values for 29 countries Caller ID detect - On-hook Caller ID detection - Off-hook Call Waiting Caller ID detection during data mode in V.92, V.90, V.34 V.32bis, or V.32 Distinctive ring detect Telephony/TAM - V.253 commands - 2-bit and 4-bit Conexant ADPCM, 8-bit linear PCM, and 4-bit IMA coding - 8 kHz sample rate - Concurrent DTMF, ring, and Caller ID detection Conexant 1-5 SC56D SC56D Single Chip ACF Modem Data Sheet · · · · · · · · · 1.2.2 Applications · · · · · 1-6 Full-duplex speakerphone (FDSP) mode using optional CX20437 CX20437 Voice Codec (S models) - Microphone and speaker interface - Telephone handset or headset interface - Acoustic and line echo cancellation - Microphone gain and muting - Speaker volume control and muting Built-in host/DTE interface - Parallel 16550A UART-compatible interface with speeds up to 230.4 kbps - Serial ITU-T V.24 (EIA/TIA-232-E EIA/TIA-232-E) logical interface with speeds up to 115.2 kbps Direct mode (serial DTE interface) Flow control and speed buffering Automatic format/speed sensing Serial async/sync data; parallel async data Thin packages support low profile designs (1.6 mm max. height) - CX06827 CX06827 ACF: 144-pin TQFP - CX20437 CX20437 VC: 32-pin TQFP +3.3V operation with +5V tolerant digital inputs Typical power use - CX06827 CX06827 ACF: 274 mW (Normal Mode); 27.7 mW (Sleep Mode) - CX20437 CX20437 VC: 5 mW (Normal Mode) Desktop Modems Serial box modems Remote monitoring and data collection systems Standalone TAM/fax machines Set-top boxes Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 1.3 Technical Overview 1.3.1 General Description Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, optional voice/speakerphone interface, optional analog cellular phone interface, GSM interface, and host interface functions are supported and controlled through the V.250, V.251, and V.253-compatible command set. The modem hardware connects to the host via a parallel or serial interface as selected by the PARIF input. The OEM adds a crystal circuit, flash ROM, RAM, telephone line interface, telephone handset/telephony extension interface, voice/speakerphone interface, cellular interface, GSM interface, optional external serial EEPROM, and other supporting discrete components as supported by the modem model (Table 1-1) and required by the application to complete the system. Customized modem firmware and additional or modified country profiles can be supported by the use external flash ROM (optional serial EEPROM can also be used if external flash ROM capacity is exceeded). Customized code can include OEM-defined commands, i.e., identification codes (I3), identifier string (I4), manufacturer identification (+GMI), model identification (+GMM), and revision identification (+GMR), as well as code modification. Parallel interface operation is selected by PARIF input high. Telephone line, cellular (AMPS) phone, or GSM phone interface operation is selected by the LINE/CELL and LINE/GSM inputs. Installation of cellular phone driver is also required for cellular phone interface operation. Installation of GSM firmware is also required for GSM phone interface operation. Serial interface operation is selected by PARIF input low. Telephone line or cellular (AMPS) phone interface operation is selected by the LINE/CELL input. Installation of cellular phone driver is also required for cellular phone interface operation. 1.3.2 MCU Firmware MCU firmware performs processing of general modem control, command sets, data modem, error correction and data compression (ECC), fax class 1, fax class 1.0, fax class 2, voice/audio/TAM/speakerphone, worldwide, V.80, and serial DTE/parallel host interface functions according to modem models. MCU firmware can be customized to include OEM-defined commands, i.e., identification codes (I3), identifier string (I4), manufacturer identification (+GMI), model identification (+GMM), and revision identification (+GMR), as well as code modification. The modem firmware is provided in object code form for the OEM to program into external flash ROM. The modem firmware may also be provided in source code form under a source code addendum license agreement. 101098E 101098E Conexant 1-7 SC56D SC56D Single Chip ACF Modem Data Sheet 1.3.3 1.3.3.1 Operating Modes Data/Fax Modes In V.92 data modem (SC56 models), the modem can support the following: · Receive data from a digital source supporting V.92 over the digital telephone network portion of the PSTN at line speeds up to 56 kbps. · PCM upstream which transmits data at line speeds up to 48 kbps. · QuickConnect which allows quicker subsequent connection to a V.92 server using stored line parameters obtained during the initial connection. · Modem-on-Hold which allows detection and reporting of incoming phone calls on the PSTN with enabled Call Waiting. If the incoming call is accepted by the user, the user has a pre-defined amount of time of holding the data connection for a brief conversation. The data connection resumes upon incoming call termination. · V.92 mode can fallback to full-duplex V.90 mode. In V.90 data modem mode (SC56 models), the modem can receive data from a digital source using a V.90-compatible central site modem over the digital telephone network portion of the PSTN at line speeds up to 56 kbps. Asymmetrical data transmission supports sending data at line speeds up to V.34 rates. This mode can fallback to fullduplex V.34 mode and to slower rates as dictated by line conditions. In V.34 data modem mode (SC56 and SC33 models), the modem can operate in 2-wire, full-duplex, asynchronous modes at line rates up to 33.6 kbps. Data modem modes perform complete handshake and data rate negotiations. Using V.34 modulation to optimize modem configuration for line conditions, the modem can connect at the highest data rate that the channel can support from 33600 bps down to 2400 bps with automatic fallback. Automode operation in V.34 is provided in accordance with PN3320 PN3320 and in V.32 bis in accordance with PN2330 PN2330. All tone and pattern detection functions required by the applicable ITU or Bell standards are supported. In V.32 bis data modem mode, the modem can operate at line speeds up to 14.4 kbps. In V.22 bis fast connect data mode, the modem can connect at 2400 bps with a very short training time, which is very efficient for small data transfers. In fax modem mode, the modem can operate in 2-wire, half-duplex, synchronous modes and can support Group 3 facsimile send and receive speeds of 14400, 12000, 9600, 7200, 4800, and 2400 bps. Fax data transmission and reception performed by the modem are controlled and monitored through the EIA/TIA-578 EIA/TIA-578 Fax Class 1, T.31 Fax Class 1.0, or Fax Class 2 command interface. Full HDLC formatting, zero insertion/deletion, and CRC generation/checking are provided. 1.3.3.2 V.44 Data Compression V.44 provides more efficient data compression than V.42 bis that significantly decreases the download time for the types of files associated with Internet use. This significant improvement is most noticeable when browsing and searching the web since HTML text files are highly compressible. (The improved performance amount varies both with the actual format and with the content of individual pages and files.) 1-8 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 1.3.3.3 Synchronous Access Mode (SAM) - Video Conferencing V.80 Synchronous Access Mode between the modem and the host/DTE is provided for host-controlled communication protocols, e.g., H.324 video conferencing applications. Voice-call-first (VCF) before switching to a videophone call is also supported. 1.3.3.4 Worldwide Operation The modem operates in TBR21-compliant and other countries. Country-dependent modem parameters for functions such as dialing, carrier transmit level, calling tone, call progress tone detection, answer tone detection, blacklisting, caller ID, and relay control are programmable (see Section 2.13). Country code IDs are defined by ITU-T T.35. External flash ROM includes default profiles for 29 countries including TBR21compliant profiles. These profiles can be overridden by modified values stored in external serial EEPROM. A maximum of 31 country profiles can be stored in external flash ROM. Additional country profiles can be stored in external serial EEPROM (request additional country profiles from a Conexant Sales Office). The default countries supported are listed in Table 1-2. Table 1-2. Default Supported Countries Country Australia Austria Belgium Brazil China Denmark Finland France Germany Greece 1.3.3.5 Country Code 09 0A 0F 16 26 31 3C 3D 42 46 Country India Ireland Italy Japan Korea Malaysia Mexico Netherlands Norway Poland Country Code 53 57 59 00 61 6C 73 7B 82 8A Country Portugal Singapore South Africa Spain Sweden Switzerland Taiwan United Kingdom United States Country Code 8B 9C 9F A0 A5 A6 FE B4 B5 TAM Mode TAM Mode features include 8-bit linear coding at 8 kHz sample rate. Tone detection/ generation, call discrimination, and concurrent DTMF detection are also supported. ADPCM (4-bit IMA) coding is also supported to meet Microsoft WHQL logo requirements. TAM Mode is supported by four submodes: · · · · 101098E 101098E Online Voice Command Mode supports connection to the telephone line or, for S models, a microphone/speaker/handset/headset. Voice Receive Mode supports recording voice or audio data input from the telephone line or, for S models, a microphone/handset/headset. Voice Transmit Mode supports playback of voice or audio data to the telephone line or, for S models, a speaker/handset/headset. Full-duplex Receive and Transmit Mode. Conexant 1-9 SC56D SC56D Single Chip ACF Modem Data Sheet 1.3.3.6 Voice/Speakerphone Mode (S Models) S models include additional telephone handset, external microphone, and external speaker interfaces which support voice and full-duplex speakerphone (FDSP) operation. Hands-free full-duplex telephone operation is supported in Speakerphone Mode under host control. Speakerphone Mode features an advanced proprietary speakerphone algorithm which supports full-duplex voice conversation with acoustic, line, and handset echo cancellation. Parameters are constantly adjusted to maintain stability with automatic fallback from full-duplex to pseudo-duplex operation. The speakerphone algorithm allows position independent placement of microphone and speaker. The host can separately control volume, muting, and AGC in microphone and speaker channels. 1.3.4 Reference Design A data/fax/TAM/speakerphone reference design for an external modem (RD00-D930 RD00-D930) is available to minimize application design time, reduce development cost, and accelerate market entry. A design package is available in electronic form. This package includes schematics, bill of materials (BOM), vendor part list (VPL), board layout files in Gerber format, and complete documentation. 1.3.5 GSM (Parallel Host Interface) Supported GSM features include: · · · · · · · · · Data modem - V.21, V.23, V.22, V.22 bis, V.32 - ISDN interoperability: 300 bps to 9600 bps Transparent asynchronous mode up to 9600 bps Non-transparent mode (RLP) up to 9600 bps Fax modem send and receive rate up to 9600 bps AT GSM commands (ETSI 07.07) GSM direct connect Firmware interface for OEM-provided phone driver Automatic GSM cable presence detection Built-in parallel host (16550A UART) interface GSM operation requires 1M of an external 4M (512k x 8) ROM/flash ROM. 1-10 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 1.4 Hardware Description 1.4.1 CX06827 CX06827 Modem Controller and DSP The CX06827 CX06827 Modem Controller and DSP (ACF), packaged in a 144-pin TQFP, includes a Microcontroller (MCU), a Modem Data Pump (MDP), bootloader ROM, and line interface functions. The ACF connects to host via a parallel host (PARIF = high) or a logical V.24 (EIA/TIA232-E EIA/TIA232-E) serial DTE interface (PARIF = low). The ACF performs the command processing and host interface functions. The crystal frequency is 28.224 MHz. The ACF also performs telephone line signal modulation/demodulation in a hardware digital signal processor (DSP) which reduces computational load on the host processor. The ACF connects to external OEM-supplied flash ROM and RAM over a nonmultiplexed 19-bit address bus and 8-bit data bus. GSM operation requires 1 Mbit of an external 4 Mbits (512k x 8) ROM/flash ROM. The ACF optionally connects to an external OEM-supplied serial EEPROM over a dedicated 2-line serial interface. The capacity of the EEPROM can be 256 bytes up to 32k bytes. The EEPROM can hold information such as firmware configuration customization, country code parameters, and cellular drivers. 1.4.2 CX20437 CX20437 Voice Codec The optional CX20437 CX20437 Voice Codec (VC), packaged in a 32-pin TQFP, supports voice/full-duplex speakerphone (FDSP) operation with interfaces to a microphone and speaker and to a telephone handset/headset. The VC also supports and analog cellular operation with direct connect interface to a cellular phone (in lieu of telephone handset/headset connection). 1.5 Commands The modem supports data modem, fax class 1 and 1.0 modem, fax class 2 modem, voice/audio, FDSP, MNP 10/MNP 10/MNP 10EC, and V.80 commands, and S Registers depending upon modem model. See Doc. No. 100722 for a description of the commands. Data Modem Operation. Data modem functions operate in response to the AT commands when +FCLASS=0. Default parameters support U.S./Canada operation. MNP 10 Operation. MNP 10 functions operate in response to MNP 10 commands. MNP 10EC Operation. MNP 10EC is enabled by the -SEC=1 command. Fax Modem Operation. Facsimile functions operate in response to fax class 1 commands when +FCLASS=1, fax class 1.0 commands when +FCLASS=1.0, or to fax class 2 commands when +FCLASS=2. Voice/Audio Operation. Voice/audio mode functions operate in response to voice/audio commands when +FCLASS=8. Speakerphone Operation. FDSP functions operate in response to speakerphone commands when +FCLASS=8 and +VSP=1 is selected. 101098E 101098E Conexant 1-11 SC56D SC56D Single Chip ACF Modem Data Sheet This page is intentionally blank. 1-12 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 2. Technical Specifications 2.1 Serial DTE Interface Operation 2.1.1 Automatic Speed/Format Sensing Command Mode and Data Modem Mode. The modem can automatically determine the speed and format of the data sent from the DTE. The modem can sense speeds of 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 38400, 57600, and 115200 bps and the following data formats: Data Length No. of Character Length Parity (No. of Bits) Stop Bits (No. of Bits) None 7 2 10 Odd 7 1 10 Even 7 1 10 None 8 1 10 Odd 8 1 11* Even 8 1 11* *11-bit characters are sensed, but the parity bit is stripped off during data transmission in Normal and Error Correction modes. The modem can speed sense data with mark or space parity and configures itself as follows: DTE Configuration 7 mark 7 space 8 mark 8 space Modem Configuration 7 none 8 none 8 none 8 even Fax Modem Mode. In V.17 fax mode, the modem can sense speeds up to 115.2 kbps. 101098E 101098E Conexant 2-1 SC56D SC56D Single Chip ACF Modem Data Sheet 2.2 Parallel Host Bus Interface Operation Command Mode and Data Modem Mode. The modem can operate at rates up to 230.4 kbps by programming the Divisor Latch in the parallel interface registers if supported by communications software and/or driver (a Windows 95/98 driver is available from Conexant). Fax Modem Mode. In V.17 mode, the modem can operate at rates up to 230.4 kbps by programming the Divisor Latch in the parallel interface registers if supported by communications software and/or driver (a Windows 95/98 driver is available from Conexant). 2.3 Establishing Data Modem Connections 2.3.1 Telephone Number Directory The modem supports four telephone number entries in a directory that can be saved in a serial NVRAM. Each telephone number can be up to 32 characters (including the command line terminating carriage return) in length. A telephone number can be saved using the &Zn=x command, and a saved telephone number can be dialed using the DS=n command. 2.3.2 Dialing DTMF Dialing. DTMF dialing using DTMF tone pairs is supported in accordance with ITU-T Q.23. The transmit tone level complies with Bell Publication 47001. Pulse Dialing. Pulse dialing is supported in accordance with EIA/TIA-496-A EIA/TIA-496-A. Blind Dialing. The modem can blind dial in the absence of a dial tone if enabled by the X0, X1, or X3 command. 2.3.3 Modem Handshaking Protocol If a tone is not detected within the time specified in the S7 register after the last digit is dialed, the modem aborts the call attempt. 2.3.4 Call Progress Tone Detection Ringback, equipment busy, congested tone, warble tone, and progress tones can be detected in accordance with the applicable standard. 2.3.5 Answer Tone Detection Answer tone can be detected over the frequency range of 2100 ± 40 Hz in ITU-T modes and 2225 ± 40 Hz in Bell modes. 2-2 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 2.3.6 Ring Detection A ring signal can be detected from a TTL-compatible 15.3 Hz to 68 Hz square wave input. 2.3.7 Billing Protection When the modem goes off-hook to answer an incoming call, both transmission and reception of data are prevented for 2 seconds (data modem) or 4 seconds (fax adaptive answer) to allow transmission of the billing tone signal. 2.3.8 Connection Speeds The modem functions as a data modem when the +FCLASS=0 command is active. Line connection can be selected using the +MS command. The +MS command selects modulation, enables/disables automode, and selects minimum and maximum line speeds (Table 2-1). 2.3.9 Automode Automode detection can be enabled by the +MS command to allow the modem to connect to a remote modem in accordance with draft PN-3320 PN-3320 for V.34 (Table 2-1). Table 2-1. +MS Command Automode Connectivity Modulation V21 V22 V22B V23 V32 V32B V34 V.21 V.22 V.22 bis V.23 V.32 V.32 bis V.34 V90 V.90 V92 V.92 Possible Rates (bps) 1 300 1200 2400 or 1200 1200 9600 or 4800 14400, 12000, 9600, 7200, or 4800 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, or 2400 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 44000, 42667, 41333, 40000, 38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 300 1200 Notes See Note 2 Default for SC14 models Default for SC33 models Default for SC56 models B103 Bell 103 B212 Bell 212 Notes: 1. See optional , , and subparameters for the +MS command. 2. For V.23, originating modes transmit at 75 bps and receive at 1200 bps; answering modes transmit at 1200 bps and receive at 75 bps. The rate is always specified as 1200 bps. V.23 half duplex is not supported. 3. If the DTE speed is set to less than the maximum supported DCE speed in automode, the maximum connection speed is limited to the DTE speed. 101098E 101098E Conexant 2-3 SC56D SC56D Single Chip ACF Modem Data Sheet 2.4 Data Mode Data mode exists when a telephone line connection has been established between modems and all handshaking has been completed. 2.4.1 Speed Buffering (Normal Mode) Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed different than the line speed. The modem supports speed buffering at all line speeds. 2.4.2 Flow Control DTE-to-Modem Flow Control. If the modem-to-line speed is less than the DTE-tomodem speed, the modem supports XOFF/XON or RTS/CTS flow control with the DTE to ensure data integrity. 2.4.3 Escape Sequence Detection The + escape sequence can be used to return control to the command mode from the data mode. Escape sequence detection is disabled by an S2 Register value greater than 127. 2.4.4 BREAK Detection The modem can detect a BREAK signal from either the DTE or the remote modem. The \Kn command determines the modem response to a received BREAK signal. 2.4.5 Telephone Line Monitoring GSTN Cleardown (V.92, V.90, V.34, V.32 bis, V.32). Upon receiving GSTN Cleardown from the remote modem in a non-error correcting mode, the modem cleanly terminates the call. Loss of Carrier (V.22 bis and Below). If carrier is lost for a time greater than specified by the S10 register, the modem disconnects (except MNP 10). 2.4.6 Fall Forward/Fallback (V.92/V.90/V.34/V.32 bis/V.32) During initial handshake, the modem will fallback to the optimal line connection within V.92/V.90/V.34/V.32 bis/V.32 mode depending upon signal quality if automode is enabled by the +MS or N1 command. When connected in V.92/V.90/V.34/V.32 bis/V.32 mode, the modem will fall forward or fallback to the optimal line speed within the current modulation depending upon signal quality if fall forward/fallback is enabled by the %E2 command. 2-4 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 2.4.7 Retrain The modem may lose synchronization with the received line signal under poor or changing line conditions. If this occurs, retraining may be initiated to attempt recovery depending on the type of connection. The modem initiates a retrain if line quality becomes unacceptable if enabled by the %E command. The modem continues to retrain until an acceptable connection is achieved, or until 30 seconds elapse resulting in line disconnect. 2.4.8 Programmable Inactivity Timer The modem disconnects from the line if data is not sent or received for a specified length of time. In normal or error-correction mode, this inactivity timer is reset when data is received from either the DTE or from the line. This timer can be set to a value between 0 and 255 seconds by using register S30. A value of 0 disables the inactivity timer. 2.4.9 DTE Signal Monitoring (Serial DTE Interface Only) DTR#. When DTR# is asserted, the modem responds in accordance with the &Dn and &Qn commands. RTS#. RTS# is used for flow control if enabled by the &K command in normal or errorcorrection mode. 2.5 Modem-on-Hold The Modem-on-Hold (MOH) function enables the modem to place a data call to the Internet on hold while using the same line to accept an incoming or place an outgoing voice call. This feature is available only with a connection to a V.92 server and can be executed through two methods. One method is to enable MOH through the +PMH command. With Call Waiting Detection (+PCW command) enabled, an incoming call can be detected while on-line. Using a string of commands, the modem negotiates with the server to place the data connection on hold while the line is released so that it can be used to conduct a voice call. Once the voice call is completed, the modem can quickly renegotiate with the server back to the original data call. An alternative method is to use communications software that makes use of the Conexant Modem-on-Hold drivers. Using this method, the software can detect an incoming call, place the data connection on hold, and switch back to a data connection. 101098E 101098E Conexant 2-5 SC56D SC56D Single Chip ACF Modem Data Sheet 2.6 Error Correction and Data Compression 2.6.1 V.42 Error Correction V.42 supports two methods of error correction: LAPM and, as a fallback, MNP 4. The modem provides a detection and negotiation technique for determining and establishing the best method of error correction between two modems. 2.6.2 MNP 2-4 Error Correction MNP 2-4 is a data link protocol that uses error correction algorithms to ensure data integrity. Supporting stream mode, the modem sends data frames in varying lengths depending on the amount of time between characters coming from the DTE. 2.6.3 V.44 Data Compression V.44 data compression encodes pages and files associated with Web pages more efficiently than V.42 bis. These files include WEB pages, graphics and image files, and document files. V.44 can provide an effective data throughput rate up to DTE rate for a 56-kbps connection. The improved performance amount varies both with the actual format and with the content of individual pages and files. V.44 data compression is controlled by the +DS44 extended-format compound parameter. 2.6.4 V.42 bis Data Compression V.42 bis data compression mode, enabled by the %Cn command or S46 register, operates when a LAPM or MNP 10 connection is established. The V.42 bis data compression employs a "string learning" algorithm in which a string of characters from the DTE is encoded as a fixed length codeword. Two 2k-byte dictionaries are used to store the strings. These dictionaries are dynamically updated during normal operation. 2.6.5 MNP 5 Data Compression MNP 5 data compression mode, enabled by the %Cn command, operates during an MNP connection. In MNP 5, the modem increases its throughput by compressing data into tokens before transmitting it to the remote modem, and by decompressing encoded received data before sending it to the DTE. 2-6 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 2.7 MNP 10 Data Throughput Enhancement MNP 10 protocol and MNP Extended Services enhance performance under adverse channel conditions such as those found in rural, long distance, or cellular environments. An MNP 10 connection is established when an MNP 2-4 connection is negotiated with a remote modem supporting MNP 10. MNP Extended Services. The modem can quickly switch to MNP 10 operation when the remote modem supports MNP 10 and both modems are configured to operate in V.42. V.42 bis/MNP 5 Support. V.42 bis/MNP 10 can operate with V.42 bis or MNP 5 data compression. 2.8 MNP 10ECTM 10ECTM Enhanced Cellular Connection A traditional landline modem, when used for high-speed cellular data transmission, typically encounters frequent signal interference and degradation in the connection due to the characteristics of the analog cellular network. In this case, cellular-specific network impairments, such as non-linear distortion, fading, hand-offs, and high signal-to-noise ratio, contribute to an unreliable connection and lower data transfer performance. Implementations relying solely on protocol layer methods, such as MNP 10, generally cannot compensate for the landline modem's degraded cellular channel performance. The modem achieves higher cellular performance by implementing enhanced cellular connection techniques at both the physical and protocol layers, depending on modem model. The modem enhances the physical layer within the modulation by optimizing its responses to sudden changes in the cellular connection. The MNP 10EC protocol layer implemented in the modem firmware improves data error identification/correction and maximizes data throughput by dynamically adjusting speed and packet size based on signal quality and data error performance. 2.9 Fax Class 1 and Fax Class 1.0 Operation Facsimile functions operate in response to fax class 1 commands when +FCLASS=1 or to fax class 1.0 commands when +FCLASS=1.0. In the fax mode, the on-line behavior of the modem is different from the data (non-fax) mode. After dialing, modem operation is controlled by fax commands. Some AT commands are still valid but may operate differently than in data modem mode. Calling tone is generated in accordance with T.30. 2.10 Voice/Audio Mode Voice and audio functions are supported by the Voice Mode. Voice Mode includes four submodes: Online Voice Command Mode, Voice Receive Mode, Voice Transmit Mode, and Full-Duplex Receive and Transmit Mode. 101098E 101098E Conexant 2-7 SC56D SC56D Single Chip ACF Modem Data Sheet 2.10.1 Online Voice Command Mode This mode results from the connection to the telephone line or a voice/audio I/O device (e.g., microphone, speaker, or handset) through the use of the +FCLASS=8 and +VLS commands. After mode entry, AT commands can be entered without aborting the connection. 2.10.2 Voice Receive Mode This mode is entered when the +VRX command is active in order to record voice or audio data input at the RIN pin, typically from a microphone/handset or the telephone line. Received analog voice samples are converted to digital form and compressed for reading by the host. AT commands control the codec bits-per-sample rate. Received analog mono audio samples are converted to digital form and formatted into 8bit unsigned linear PCM format for reading by the host. AT commands control the bit length and sampling rate. Concurrent DTMF/tone detection is available at the 8 kHz sample rate. 2.10.3 Voice Transmit Mode This mode is entered when the +VTX command is active in order to playback voice or audio data to the TXA output, typically to a speaker/handset or to the telephone line. Digitized voice data is decompressed and converted to analog form at the original compression quantization sample-per-bits rate then output to the TXA output. Digitized audio data is converted to analog form then output to the TXA output. 2.10.4 Full-Duplex Receive and Transmit Mode This mode is entered when the +VTR command is active in order to concurrently receive and transmit voice. 2-8 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 2.10.5 Audio Mode The audio mode enables the host to transmit and receive 8-bit audio signals. In this mode, the modem directly accesses the internal analog-to-digital (A/D) converter (ADC) and the digital-to-analog (D/A) converter (DAC). Incoming analog audio signals can then be converted to digital format and digital signals can be converted to analog audio output. 2.10.6 Tone Detectors The tone detector signal path is separate from the main received signal path thus enabling tone detection to be independent of the configuration status. In Tone Mode, all three tone detectors are operational. 2.10.7 Speakerphone Modes Speakerphone modes are controlled in voice mode with the following commands: Use Speakerphone After Dialing or Answering (+VSP=1). +VSP=1 selects speakerphone mode while in +FCLASS=8 mode. Speakerphone operation is entered during Voice Online Command mode after completing dialing or answering. Speakerphone Settings. The +VGM and +VGS commands can be used to control the microphone gain and speaker volume, respectively. VGM and +VGS commands are valid only after the modem has entered the Voice Online mode while in the +VSP=1 setting. 2.11 Full-Duplex Speakerphone (FDSP) Mode (S Model) The modem operates in FDSP mode when +FCLASS=8 and +VSP=1 (Section 2.10.7). In FDSP Mode, speech from a microphone or handset is converted to digital form, shaped, and output to the telephone line through the line interface circuit. Speech received from the telephone line is shaped, converted to analog form, and output to the speaker or handset. Shaping includes both acoustic and line echo cancellation. 2.12 Caller ID Both Type I Caller ID (On-Hook Caller ID) and Type II Caller ID (Call Waiting Caller ID) are supported for U.S. and many other countries (see Section 2.13). Both types of Caller ID are enabled/disabled using the +VCID command. Call Waiting Tone detection must be enabled using the +PCW command to detect and decode Call Waiting Caller ID. When enabled, caller ID information (date, time, caller code, and name) can be passed to the DTE in formatted or unformatted form. Inquiry support allows the current caller ID mode and mode capabilities of the modem to be retrieved from the modem. Type II Caller ID (Call Waiting Caller ID) detection operates only during data mode in V.92, V.90, V.34, V.32bis, or V.32. 2.13 Worldwide Country Support Internal modem firmware supports 29 country profiles (see Section 1.3.2). These country profiles include the following country-dependent parameters: 101098E 101098E Conexant 2-9 SC56D SC56D Single Chip ACF Modem Data Sheet · · · · · · · · · · · Dial tone detection levels and frequency ranges. DTMF dialing parameters: Transmit output level, DTMF signal duration, and DTMF interdigit interval. Pulse dialing parameters: Make/break times, set/clear times, and dial codes are programmable Ring detection frequency range. Type I and Type II Caller ID are supported for many countries. Consult firmware release notes for a list of the supported countries and the criteria for additional country support. Blind dialing enabled/disable. Carrier transmit level (through S91 for data and S92 for fax). The maximum, minimum, and default values can be defined to match specific country and DAA requirements. Calling tone is generated in accordance with V.25. Calling tone may be toggled (enabled/disabled) by inclusion of a "^" character in a dial string. It may also be disabled. Frequency and cadence of tones for busy, ringback, congested, warble, dial tone 1, and dial tone 2. Answer tone detection period. Blacklist parameters. The modem can operate in accordance with requirements of individual countries to prevent misuse of the network by limiting repeated calls to the same number when previous call attempts have failed. Call failure can be detected for reasons such as no dial tone, number busy, no answer, no ringback detected, voice (rather than modem) detected, and key abort (dial attempt aborted by user). Actions resulting from such failures can include specification of minimum inter-call delay, extended delay between calls, and maximum numbers of retries before the number is permanently forbidden ("blacklisted"). These country profiles may be altered or customized by modifying the country-dependent parameters. Additional profiles may also be included. There are two ways to add or modify profiles: · · Incorporating additional or modified profiles into external flash ROM containing the entire modem firmware code. Linking additional or modified profiles from an external serial EEPROM (needed only if the external flash ROM capacity is exceeded. Please contact an FAE at the local Conexant sales office if a country code customization is required. 2.14 Diagnostics 2.14.1 Commanded Tests Diagnostics are performed in response to &T commands. Analog Loopback (&T1 Command). Data from the local DTE is sent to the modem, which loops the data back to the local DTE. 2-10 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 2.14.2 Power On Reset Tests Upon power on, the modem performs tests of the modem, internal and external RAM, and NVRAM. If the modem, internal RAM, or external RAM test fails, the TMIND# output is pulsed (serial interface version) or the DCD bit in the parallel interface register is pulsed (parallel interface version) as follows: · · Internal or external RAM test fails: One pulse cycle (pulse cycle = 0.5 sec. on, 0.5 sec. off) every 1.5 seconds. Modem device test fails: Three pulse cycles every 1.5 seconds. If the NVRAM test fails (due to NVRAM failure or if NVRAM is not installed), the test failure is reported by AT commands that normally use the NVRAM, e.g., the &V command. 2.15 Low Power Sleep Mode Sleep Mode Entry. The modem enters the low power sleep mode when no line connection exists and no host activity occurs for the period of time specified in the S24 register. All modem circuits are turned off except the internal clock circuitry in order to consume reduced power while being able to immediately wake up and resume normal operation. Wake-up. Wake-up occurs when a ring is detected on the telephone line, the host writes to the modem (parallel interface), or the DTE sends a character to the modem (serial interface). 2.16 GSM Operation Once the modem is connected to the GSM phone and the phone is powered on, dial/answer functions will be routed through the phone instead of the wireline DAA. No special commands are needed to place or answer GSM calls and the same AT commands and software packages that are used for wireline communication sessions can be used. While the modem is being used with a GSM phone, result messages are changed from wireline operation status to reflect GSM operation status as follows: NO DIALTONE - Indicates that GSM service is not currently available or the cellular phone is powered off. RING - Indicates that the GSM phone is receiving an incoming call. BUSY - The network reports the number dialed is busy. CARRIER - The carrier is established with the IWF (Interworking function) modem. PROTOCOL RLP - The error corrected protocol on the radio link is established. 101098E 101098E Conexant 2-11 SC56D SC56D Single Chip ACF Modem Data Sheet This page is intentionally blank. 2-12 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet 3. Hardware Interface 3.1 CX06827 CX06827 ACF Hardware Pins and Signals 3.1.1 CX06827 CX06827 ACF Interface Signals ACF hardware interface signals for parallel interface are shown by major interface in Figure 3-1, are shown by pin number in Figure 3-2, and are listed by pin number in Table 3-1. The ACF hardware interface signals for parallel interface are defined in Table 3-2. ACF hardware interface signals for serial interface are shown by major interface Figure 3-3, are shown by pin number in Figure 3-4, and are listed by pin number in Table 3-3. The ACF hardware interface signals for serial interface are defined in Table 3-4. ACF I/O types are defined in Table 3-5. ACF DC electrical characteristics are listed in Table 3-6. 101098E 101098E Conexant 3-1 SC56D SC56D Single Chip ACF Modem Data Sheet Figure 3-1. CX06827 CX06827 ACF Hardware Signals for Parallel Interface (PARIF = High) 116 117 CRYSTAL CIRCUIT 115 67 NC NC 119 +3.3V 16 54 NC 21 23 22 112 17 18 19 123 124 126 127 128 130 132 133 PARALLEL HOST INTERFACE 41 142 240K +3.3V EEPROM (OPTIONAL) 40 27 SCL SDA 47K +3.3V NC NC (PARALLEL HOST INTERFACE ONLY) NC NC +3.3V OR +5V +3.3V +3.3V A (FILTERED) 63 20 55 65 114 122 113 61 34 104 110 53 31 58 60 57 35 97 98 99 100 101 66 29 48 64 84 103 111 125 131 59 118 1 10 135 46 71 106 129 11 9 15 134 LINE/GSM (PA5) 38 LINE/GSM SELECT LINE/CELL SELECT CONTROL GSMRXD (PA2) GSMTXD (PA6) 35 39 GSMRXD GSMTXD GSMINP0 RXPAD# TXPAD# GSM PHONE CLKCLK/GSMPIN0 (PA4) CELDATA (PE5) CELBSY# (PA3) 37 30 36 CELCLK CELDATA CELBSY# CELBSY RXPAD# TXPAD# CELL PHONE EXTOH#/LINE/CELL (PE7) MUTE#/CELBSY (PE2) OH#/RXPAD# (PE0) VOICE#/TXPAD# (PE1) LCS (PE4) RING (PA0) LINE_OUT_P LINE_OUT_M MIC_IN 32 26 24 25 28 33 137 138 141 EXTOH# MUTE# OH# VOICE# LCS RING TXAP TXAM RXA DAA ASPKR 136 VREF VC 139 140 LINE_IN MIC_BIAS M_RELAY_A M_ACT_90 DLPBK_BAR 143 144 8 12 13 XTLI XTLO CLKIN CLKOUT NMIP PARIF (MK0) NOXYCK HCS# (PD4) HRD# (PD6) HWT# (PD5) HINT (PB7) HA0 (PD0) HA1 (PD1) HA2 (PD2) HD0 (PC0) HD1 (PC1) HD2 (PC2) HD3 (PC3) HD4 (PC4) HD5 (PC5) HD6 (PC6) HD7 (PC7) RES1# RES2# 0.1 LPO NVMCLK (PA7) NVMDATA (PE3) PD3 XXCLK BD2CLK DV1TP PHS2 TESTP P_PA00 PA1 PB1 PB6 PD7 PE6 P_GP01 P_PA03 P_PA07 GSMRXD (PA2) RESERVED RESERVED RESERVED RESERVED RESERVED CX06827 CX06827 Single Chip ACF Modem SLEEP_IN MCLKIN CNTLSIN RXOUT TXSIN 144-Pin TQFP Parallel Interface (PARIF = High) STROBE SCLK AVDD VSS VSS VSS VSS DVSS AGND AGND AGND 0.1 10 10 AGND NC AGND 14 3 2 6 4 7 5 IA1CLK (P_PX03) SA1CLK (P_PX02) SR4OUT (P_PX00) SR4IN SR1IO (P_PX07) IASLEEP (P_PF05) 33 33 51 50 49 52 62 56 MCLKOUT (P_PB00) SR2CLK (P_PGP05 PGP05) SA2CLK (P_PX05) SR3OUT SR3IN (P_PX01) SR2IO (P_PX06) PLLVDD VGG VDD VDD VDD VDD VDD VDD VDD VDD VDD VDD DVDD DVDD SPEAKER CIRCUIT 44 96 45 42 43 47 SLEEP 33 M_CLKIN M_SCK M_STROBE M_TXSIN M_RXOUT M_CNTRLSIN 88 CX20437 CX20437 VOICE CODEC (VC) (OPTIONAL) +3.3V 0.1uF PLLGND A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 (PB0) A17 (PB4) A18 (PB5) D0 D1 D2 D3 D4 D5 D6 D7 RD# WT# RAMSEL# (PB3) ROMSEL# (PB2) 89 77 78 79 80 81 82 83 85 86 87 90 91 92 93 94 95 102 108 109 68 69 70 72 73 74 75 76 121 120 107 105 EXTERNAL RAM AND ROM 101098_003 3-2 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet PB6 A18 (PB5) 110 109 CLKIN DV1TP 115 114 113 TESTP HINT (PB7) VDD XTLO XTLI 117 116 112 111 NMIP VDD 121 120 119 118 HD1 (PC1) HD0 (PC0) 124 123 122 PHS2 RD# WT# HD2 (PC2) VDD 126 125 VSS HD4 (PC4) HD3 (PC3) 130 129 128 127 HD7 (PC7) HD6 (PC6) 133 132 131 VDD HD5 (PC5) AVDD AGND 135 134 LINE_OUT_M LINE_OUT_P ASPKR 139 138 137 136 RES2# MIC_IN 142 141 140 VC VREF MIC_BIAS LINE_IN 144 143 Figure 3-2. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) A17 (PB4) RAMSEL# (PB3) VSS ROMSEL# (PB2) DVDD CNTLSIN 1 2 108 107 MCLKIN TXSIN SCLK 3 4 5 106 105 104 RXOUT STROBE M_RELAY_A 6 7 8 103 102 101 PB1 VDD A16 (PB0) RESERVED AGND DVDD DVSS 9 10 11 100 99 98 RESERVED RESERVED RESERVED M_ACT_90 DLPBK_BAR 12 13 14 15 97 96 95 94 16 17 18 93 92 91 19 20 21 90 89 88 A09 A08 A07 VDD A06 A05 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 P_PA07 P_GP01 VDD P_PA03 P_PA00 SR1IO (PX07) LPO VDD BD2CLK VGG CLKOUT D0 D1 D2 VSS D3 SR4IN SA1CLK (P_PX02) IA1CLK (P_PX03) XXCLK IASLEEP (P_PF05) D5 D4 53 54 74 73 PD7 NOXYCK 35 36 51 52 A00 D7 D6 48 49 50 77 76 75 VDD SR4OUT (P_PX00) 32 33 34 37 38 A04 A03 A02 A01 CELCLK/GSMINP0 (PA4) LINE/GSM (PA5) RING (PA0) PA1 GSMRXD (PA2) CELBSY# (PA3) A11 A10 PLLGND PLLVDD 80 79 78 46 47 PE6 EXTOH# (PE7) 83 82 81 A14 A13 A12 29 30 31 VSS SR2IO (P_PX06) LCS (PE4) VDD CELDATA (PE5) 87 86 85 84 Parallel Interface (PARIF Pin = High) 26 27 28 44 45 VOICE#/TXPAD# (PE1) MUTE#/CELBSY (PE2) NVMDATA (PE3) CX06827 CX06827 22 23 24 25 42 43 HRD# (PD6) OH#/RXPAD# (PE0) SR3OUT SR3IN (P_PX01) MCLKOUT (P_PB00) SA2CLK (P_PX05) HA2 (PD2) PD3 HCS# (PD4) HWT# (PD5) 39 40 41 HA0 (PD0) HA1 (PD1) GSMTXD (PA6) NVMCLK (PA7) RES1# SLEEP_IN AGND PARIF (MK0) RESERVED SR2CLK (P_PGP05 PGP05) A15 101098 _004 101098E 101098E Conexant 3-3 SC56D SC56D Single Chip ACF Modem Data Sheet Table 3-1. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) Pin Signal Label I/O P Interface Pin +3.3V 73 Signal Label D4 I/O I/O Interface 1 DVDD EB: D4 2 CNTLSIN I ACF: SR1IO 74 D5 I/O EB: D5 3 MCLKIN I ACF: MCLKOUT through 33 ohms 75 D6 I/O EB: D6 4 TXSIN I ACF: SR4OUT 76 D7 I/O EB: D7 5 SCLK O ACF: IA1CLK through 33 ohms 77 A00 O EB: A00 6 RXOUT O ACF: SR4IN 78 A01 O EB: A01 7 STROBE O ACF:SA1CLK through 33 ohms 79 A02 O EB: A02 8 M_RELAY_A O NC 80 A03 O EB: A03 9 AGND G AGND 81 A04 O EB: A04 10 11 DVDD DVSS P G +3.3V GND 82 83 A05 A06 O O EB: A05 EB: A06 12 M_ACT_90 I NC 84 VDD P +3.3V 13 DLPBK_BAR I NC 85 A07 O EB: A07 14 SLEEP_IN I ACF: IASLEEP 86 A08 O EB: A08 15 AGND G AGND 87 A09 O EB: A09 16 PARIF (MK0) I NC (Parallel Host) 88 PLLVDD P +3.3V and to GND through 1 µF 17 HA0 (PD0) I HB: HA0 89 PLLGND G GND 18 HA1 (PD1) I HB: HA1 90 A10 O EB: A10 19 HA2 (PD2) I HB: HA2 91 A11 O EB: A11 20 PD3 I +3.3V through 47 K 92 A12 O EB: A12 21 HCS# (PD4) I HB: CS# 93 A13 O EB: A13 22 HWT# (PD5) I HB: WT# 94 A14 O EB: A14 23 HRD# (PD6) I HB: RD# 95 A15 O EB: A15 24 OH#/RXPAD# (PE0) O DAA: Off-Hook Relay Circuit; CELL/GSM: RXPAD# 96 SR2CLK (P_PGP05 PGP05) I VC: M_SCK 25 VOICE#/TXPAD# (PE1) O 97 RESERVED I/O NC 26 MUTE#/CELBSY (PE2) O DAA: Voice Relay Circuit (Optional); DAA: VOICE#; CELL/GSM:TXPAD# DAA: Mute Circuit (Optional); CELL: CELBSY 98 RESERVED I/O NC 27 NVMDATA (PE3) I/O NVRAM: SDA 99 RESERVED O NC 28 LCS (PE4) I DAA: Line Current Sense Circuit 100 RESERVED O NC 29 30 VDD CELDATA (PE5) P I +3.3V CELL: CEL_DATA 101 102 RESERVED A16 (PB0) O O NC EB: A16 31 PE6 I/O NC 103 VDD P +3.3V 32 EXTOH#/ LINE/CELL (PE7) I DAA: Extension Pickup Circuit (Optional); Line/Cell select 104 PB1 I/O NC 33 RING (PA0) I DAA: Ring Detect Circuit 105 ROMSEL# (PB2) O EB: ROM CE# 34 PA1 I/O NC 106 GND G GND 35 GSMRXD (PA2) I GSM: GSMRXD 107 RAMSEL# (PB3) O EB: RAM CS# 36 CELBSY# (PA3) I CELL: CELBSY# 108 A17 (PB4) O EB: A17 37 CELCLK/ GSMINP0 (PA4) I CELL: CELCLK; GSM: GSMINP0 109 A18 (PB5) O EB: A18 38 LINE/GSM (PA5) I Line/GSM select 110 PB6 I/O NC 39 GSMTXD (PA6) O GSM: GSMTXD 111 VDD P +3.3V 40 NVMCLK (PA7) O NVRAM: SCL 112 HINT (PB7) O HB: HINT 41 RES1# I HB: RESET# 113 TESTP I NC 42 SR3OUT O VC: M_TXSIN 114 DV1TP I NC 43 SR3IN (P_PX01) I VC: M_RXOUT 115 CLKIN I NC 44 MCLKOUT (P_PB00) O Through 33 ohms to ACF:MCLKIN and VC: M_CLKIN 116 XTLI I Crystal Circuit 45 SA2CLK (P_PX05) I VC: M_STROBE 117 XTLO O Crystal Circuit 46 GND G GND 118 VDD P +3.3V 47 SR2IO (P_PX06) O VC: M_CNTRLSIN 119 NMIP I +3.3V 48 VDD P +3.3V 120 WT# O EB: WRITE# 3-4 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet Table 3-1. CX06827 CX06827 ACF 144-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) (Continued) Pin Signal Label I/O Interface Pin Signal Label I/O Interface 49 SR4OUT (P_PX00) O ACF: TXSIN 121 RD# O EB: READ# 50 SA1CLK (P_PX02) I ACF: STROBE through 33 ohms 122 PHS2 O NC 51 IA1CLK (P_PX03) I ACF: SCLK through 33 ohms 123 HD0 (PC0) I/O HB: HD0 52 SR4IN I ACF: RXOUT 124 HD1 (PC1) I/O HB: HD1 53 PD7 I/O NC 125 VDD P +3.3V 54 NOXYCK I GND 126 HD2 (PC2) I/O HB: HD2 55 XXCLK O NC 127 HD3 (PC3) I/O HB: HD3 56 IASLEEP (P_PF05) O VC: SLEEP 128 HD4 (PC4) I/O HB: HD4 57 P_PA07 O NC 129 GND G GND 58 P_GP01 I NC 130 HD5 (PC5) I/O HB: HD5 59 VDD P +3.3V 131 VDD P +3.3V 60 P_PA03 O NC 132 HD6 (PC6) I/O HB: HD6 61 P_PA00 I/O NC 133 HD7 (PC7) I/O HB: HD7 62 SR1IO (P_PX07) O ACF: CNTLSIN 134 AGND G AGND 63 LPO I +3.3V through 240K 135 AVDD P +3.3VA (Filtered) 64 VDD P +3.3V 136 ASPKR O AI: Speaker Circuit 65 BD2CLK O NC 137 LINE_OUT_P O DAA: TXAP 66 VGG R +5V or +3.3V 138 LINE_OUT_M O DAA: TXAM 67 CLKOUT O NC 139 VREF R AGND through C circuit 68 D0 I/O EB: D0 140 VC R AGND through C circuit 69 D1 I/O EB: D1 141 MIC_IN I DAA: RXA 70 D2 I/O EB: D2 142 RES2# I HB: RESET# 71 GND G GND 143 LINE_IN I NC 72 D3 I/O EB: D3 144 MIC_BIAS O NC 101098E 101098E Conexant 3-5 SC56D SC56D Single Chip ACF Modem Data Sheet Table 3-2. CX06827 CX06827 ACF Pin Signal Definitions for Parallel Interface (PARIF = High) Label Pin I/O I/O Type System Signal Name/Description XTLI, XTLO 116, 117 I, O Ix, Ox Crystal In and Crystal Out. If an external 28.224 MHz crystal circuit is used instead of an external clock circuit, connect XTLI and XTLO to the external crystal circuit and leave CLKIN open. CLKIN 115 I It Clock In. If an external 28.224 MHz clock circuit is used instead of an external crystal circuit, connect CLKIN to the clock output and leave XTLI and XTLO open. CLKOUT 67 O It/Ot2 Clock Out. 28.224 MHz output clock. Leave open. NOXYCK 54 I Itpu Disable XCLK Output. Low disables XCLK output (reduces internal power consumption). High enables XCLK output. PARIF 16 I Itpu Parallel/Serial Interface Select. PARIF input high (open) selects parallel host interface operation. PARIF low (GND) selects serial DTE interface operation. NMI# 119 I Ithpu Non-Maskable Interrupt. Not used. Connect to +3.3V. RES1# RES2# 41 142 I It Reset. The active low RES1# and RES2# input resets the ACF logic, and restores the saved configuration from serial EEPROM or returns the modem to the factory default values if NVRAM is not present. RESET# low holds the modem in the reset state; RESET# going high releases the modem from the reset state. After application of VDD, RESET# must be held low for at least 15 ms after the VDD power reaches operating range. The modem device set is ready to use 25 ms after the low-to-high transition of RESET#. For parallel Interface, connect RESET# input to the host bus RESET line through an inverter. For serial Interface, connect RESET# input to a reset switch circuit. Power and Ground VGG 66 P PWRG I/O Signaling Voltage Source. Connect to +5V or +3.3V. VDD 29, 48, 59, 64, 66, 84, 103, 111, 118, 125, 131 P PWR Digital Supply Voltage for Digital Circuits. Connect to +3.3V. DVDD 1, 10 P PWR Digital Supply Voltage for Analog Circuits. Connect to +3.3V AVDD 135 P PWR Analog Supply Voltage for Analog Circuits. Connect to analog power. VSS 46, 71, 106, 129 G GND Digital Ground for Digital Circuits. Connect to digital ground. DVSS 11 G GND Digital Ground for Analog Circuits. Connect to digital ground. AGND 9, 15, 134 G AGND Analog Ground for Analog Circuits. Connect to analog ground. PLLVDD 88 P PWR Supply Voltage for PLL Circuit. Connect to +3.3V and to analog ground through 0.1 µF. PLLGND 89 G NVMCLK (PA7) 40 O It/Ot2 NVRAM Clock. NVMCLK output high enables the EEPROM. Connect to the EEPROM SCL pin. NVMDATA (PE3) 27 I/O It/Ot2 NVRAM Data. NVMDATA supplies serial data to and from the EEPROM. Connect to the EEPROM SDA pin and to +3.3V through 10 K. 3-6 Digital Ground for PLL Circuit. Connect to digital ground. GND Serial EEPROM (NVRAM) Interface Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet Table 3-2. CX06827 CX06827 ACF Pin Signal Definitions for Parallel Interface (PARIF = High) Label Pin I/O I/O Type External Bus Interface Signal Name/Description A00-A06 A00-A06, A07-A09 A07-A09, A10-A15 A10-A15, A16 (PB0), A17 (PB4), A18 (PB5) 77-83, 85-87, 90-95, 102, 108, 109 O, O, O, O, O, O It/Ot8, It/Ot8, It/Ot2, It/Ot2, It/Ot2, It/Ot2 Address Lines 0-18. A0-A18 A0-A18 are the address output lines used to access external memory; up to 4 Mbits (512k bytes) flash ROM using A0-A18 A0-A18 and up to 1 Mbit (128k bytes) RAM using A0-A16 A0-A16. D0-D2, D3-D7 68-70, 72-76 I/O Ith/Ot2 Data Line 0-7. D0-D7 are bidirectional external memory bus data lines. READ# 121 O It/Ot2 Read Enable. READ# output low enables data transfer from the selected device to the D0-D7 lines. WRITE# 120 O It/Ot2 Write Enable. WRITE# output low enables data transfer from the D0-D7 lines to the selected device. It/Ot2 RAM Select. RAMSEL# output low selects the external RAM. RAMSEL# PB3) ROMSEL# (PB2) 107 O ROM Select. ROMSEL# output low selects the external flash ROM. Telephone Line/Telephone/Audio Interface Signals and Reference Voltage 105 O Ot2 OH#/RXPAD# (PE0) 24 O It/Ot2 Off-Hook Relay Control. The active low output can be used to control the normally open off-hook relay. VOICE#/TXPAD# (PE1) 25 O It/Ot2 Voice Relay Control. The active low VOICE# output can optionally be used to switch the handset from the telephone line to the voice codec interface to be used as a microphone and speaker. Leave open if not used. MUTE#/CELBSY (PE2) 26 O It/Ot2 Mute Relay Control. The active low MUTE# output can optionally be used to used to control the normally open mute relay. Leave open if not used. LCS (PE4) 28 I It/Ot2 Loop Current Sense. LCS is an active high input that indicates a handset off-hook status. EXTOH#/LINE/CELL (PE7) 32 I It/Ot2 Extension Off-Hook. Active low input optionally used to indicate when the telephone handset connected to the modem goes off-hook state. Connect to +3.3V through 47K if not used. RING (PA0) 33 I It/Ot2 Ring Frequency. A rising edge on the RING input initiates an internal ring frequency measurement. The RING input from an external ring detect circuit is monitored to determine when to wake up from sleep or stop mode. The RING input is typically connected to the output of an optoisolator or equivalent. The idle state (no ringing) output of the ring detect circuit should be low. LINE_OUT_P, LINE_OUT_M 137, 138 O, O O(DF) Transmit Analog 1 and 2. The LINE_OUT_P and LINE_OUT_M outputs are differential outputs 180 degrees out of phase with each other. Each output can drive a 300 load. Connect LINE_OUT_P and LINE_OUT_M to the DAA telephone line interface transmit circuit. MIC_IN 141 I I(DA) Receive Analog. MIC_IN is a single-ended input from the telephone line interface or an optional external hybrid circuit with 70K input impedance. Connect MIC_IN to the DAA telephone line interface receive circuit. VREF 139 R REF High Voltage Reference. Connect to AGND through 10 µF (polarized, + terminal to VREF) and 0.1 µF (ceramic) in parallel. Ensure a very close proximity between these capacitors and VREF pin. Use a short path and a wide trace to AGND pin. VC 140 R REF Low Voltage Reference. Connect to AGND through 10 µF (polarized, + terminal to VC) and 0.1 µF (ceramic) in parallel. Ensure a very close proximity between these capacitors and VC pin. Use a short path and a wide trace to AGND pin. 101098E 101098E Conexant 3-7 SC56D SC56D Single Chip ACF Modem Data Sheet Table 3-2. CX06827 CX06827 ACF Pin Signal Definitions for Parallel Interface (PARIF = High) Label Pin I/O I/O Type Signal Name/Description Telephone Line/Telephone/Audio Interface Signals and Reference Voltage (Continued) ASPKR 136 O O(DF) Speaker Analog Output. The ASPKR analog output can originate from one of five different sources: RIN, TELIN, MICM or MICV or from the MDP's internal voice playback mode. The ASPKR on/off and three levels of attenuation are controlled by bits in DSP RAM. When the speaker is turned off, the ASPKR output is clamped to the voltage at the VC pin. The ASPKR output can drive an impedance as low as 300 ohms. In a typical application, the ASPKR output is an input to an external LM386 LM386 audio power amplifier. LINE_IN 143 I I(DA) Not Used. Leave open. MIC_BIAS 144 O Oa Not Used. Leave open. M_RELAYA 8 O Ot Not Used. Leave open. M_ACT90 ACT90 12 I Itpu Not Used. Leave open. DLPBK_BAR LINE/GSM (PA5) Not Used. Leave open. 13 I It Telephone Line/Analog Cellular Phone/GSM Phone Interface Select Line/GSM Interface Select. In conjunction with the LINE/CELL 38 I It/Ot2 input, selects telephone line, cellular phone (AMPS), or GSM phone interface. LINE/CELL (PE7) 32 I It/Ot8 Line/Cellar Interface Select. In conjunction with the LINE/GSM input, selects telephone line, cellular phone (AMPS), or GSM phone interface, as follows: LINE/CELL LINE/GSM Interface Selected H H Telephone Line L H Cellular (AMPS) H L GSM L L Invalid The following ports operate as indicated for the selected interface: Port PE0 PE1 PE2 PE5 PA2 PA3 PA4 PA6 Telephone Line - VOICE# - - - - - - Analog Cellular GSM RXPAD# TXPAD# CELBSY CELDATA - CELBSY# CELCLK - RXPAD# TXPAD# - - GSMRXD - GSMINP0 GSMTXD Note: Ports marked "-" are not used. Analog Cellular Phone Interface (LINE/CELL = Low and LINE/GSM = High) CELCLK/GSMINP0 (PA4) 37 I Itpu/Ot2 Cellular Clock. Defined by the cellular firmware driver. CELDATA (PE5) 30 I/O It/Ot2 Cellular Data. Defined by the cellular firmware driver. MUTE#/CELBSY (PE2) 26 O It/Ot2 Cellular Busy. Defined by the cellular firmware driver. CELBSY# (PA3) 36 I Itpu/Ot2 Cellular Not Busy. Defined by the cellular firmware driver. OH#/RXPAD# (PE0) 24 O It/Ot8 Cellular RX Bias. Defined by the cellular firmware driver. VOICE#/TXPAD# (PE1) 25 O It/Ot2 Cellular TX Bias. Defined by the cellular firmware driver. 3-8 Conexant 101098E 101098E SC56D SC56D Single Chip ACF Modem Data Sheet Table 3-2. CX06827 CX06827 ACF Pin Signal Definitions for Parallel Interface (PARIF = High) Label Pin I/O I/O Type Signal Name/Description Telephone Interface (LINE/CELL = High and LINE/GSM = High) VOICE#/TXPAD# (PE1) HS_LCS (PE4) O It/Ot2 Voice Relay Control. When the LINE/CELL input is high, this output (typically active low) used to control the normally open voice relay. See cellular interface signals for TXPAD# usage. Handset Line Current Sense. LCS is an active high input that indicates a handset off-hook status. Not required for data/fax/voice/speakerphone operation. If not used, connect to GND through 47 K. GSM Cellular Phone Interface (LINE/CELL = High and LINE/GSM = Low) I It/Ot2 CELCLK/GSMINP0 (PA4) 37 I Itpu/Ot2 GSM Input Control. Defined by the GSM firmware driver. GSMRXD (PA2) 35 I It/Ot2 GSM Serial Receive Data. Defined by the GSM firmware driver. GSMTXD (PA6) 39 O It/Ot2 GSM Serial Transmit Data. Defined by the GSM firmware driver. OH#/RXPAD# (PE0) 24 O It/Ot8 GSM RX Bias. Defined by the GSM firmware driver. GSM TX Bias. Defined by the GSM firmware driver. O It/Ot2 ACF Interconnect and Optional CX20437 CX20437 VC Interface VOICE#/TXPAD# (PE1) SLEEP_IN 14 I Itpd Modem Codec Sleep In. Connect to ACF: IASLEEP pin. MCLKIN 3 I Ipd Modem Codec Serial Clock In. Connect to ACF: MCLKOUT pin through 33 . CNTLSIN 2 I Itpd Modem Codec Serial Control In. Connect to ACF: SR1IO pin. RXOUT 6 O Ot2 Modem Codec Serial Receive Data Out. Connect to ACF: SR4IN pin. TXSIN 4 I Itpd Modem Codec Serial Transmit Data In. Connect to ACF: SR4OUT pin. STROBE 7 O Ot2 Modem Codec Serial Frame Sync Out. Connect to ACF: SA1CLK pin through 33 . SCLK 5 O Ot2 Modem Codec Serial Clock Out. Connect to ACF: IA1CLK pin through 33 . IA1CLK (P_PX03) 51 I Itpu/Ot2 DSP Modem Serial Clock In. Connect to ACF: SCLK pin through 33 . SA1CLK (P_PX02) 50 I Itpu/Ot2 DSP Modem Serial Frame Sync In. Connect to ACF: STROBE pin through 33 . SR4OUT (P_PX00) 49 O Itk/Ot2 DSP Modem Serial Transmit Data Out. Connect to ACF: TXSIN pin. SR4IN 52 I Itk/Ot2 DSP Modem Serial Receive Data In. Connect to ACF: RXOUT pin. IASLEEP (P_PF05) 56 O Ot2 DSP Sleep Out. Connect to ACF: SLEEP_IN pin and to VC SLEEP pin. M_CLKOUT (P_PB00) 44 O It/Ot2 DSP Master Serial Clock Out. Connect through 33 to ACF: MCLKIN pin and to VC M_CLKIN pin. SR2CLK (P_PGP05 PGP05) 96 I Itpu/Ot2 DSP Voice Serial Clock In. Connect to VC M_SCK pin. Leave open if VC is not installed. SA2CLK (P_PX05) 45 I Itpu/Ot2 DSP Voice Serial Frame Sync In. Connect to VC M_STROBE pin. Leave open if VC is not installed. SR3OUT 42 O Ot2 DSP Voice Serial Transmit Data Out. Connect to VC M_TXSIN pin. Leave open if VC is not installed. SR3IN (P_PX01) 43 I Itk/Ot2 DSP Voice Serial Receive Data In. Connect to VC M_RXOUT pin. Leave open if VC is not installed. SR2IO (P_PX06) 47 O