CX81801 CX20493 102025G 102025E 102025D 102025C 42/MNP DS56-L147-091 CX81801-64 - Datasheet Archive

 

with 28-Pin CTLGA V.90+/V.34/V.32bis CX81801 Smart Modem with CX20493 SmartDAA Data Sheet Doc. No. 102025G February 24, 2003

 

SmartV.XX Modem with 28-Pin CTLGA V.90+/V.34/V.32bis CX81801 CX81801 Smart Modem with CX20493 CX20493 SmartDAA Data Sheet Doc. No. 102025G 102025G February 24, 2003 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Revision Record Revision G F E D C B A Date 2/24/2003 12/10/2002 12/6/2002 11/20/2002 8/17/2002 8/14/2002 5/17/2002 Comments Rev. G release. Rev. F release. Rev. E release. Rev. D release. Rev. C release. Rev. B release. Initial release. © 2002, 2003 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, "What's Next in Communications Technologies"TM and Modem-on-Hold. SmartDAA is a registered trademark of Conexant Systems, Inc. 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 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet Contents 1. Introduction.1-1 1.1 1.2 1.3 Overview . 1-1 Features . 1-4 1.2.1 General Modem Features. 1-4 1.2.2 SmartDAA Features . 1-5 1.2.3 Applications. 1-5 Technical Overview. 1-6 1.3.1 General Description . 1-6 1.3.2 MCU Firmware. 1-6 1.3.3 Operating Modes . 1-6 1.3.3.1 Data/Fax Modes. 1-6 1.3.3.2 1.5 Synchronous Access Mode (SAM) - Video Conferencing . 1-7 1.3.3.4 1.4 V.44 Data Compression. 1-7 1.3.3.3 TAM Mode. 1-7 1.3.3.5 Worldwide Operation. 1-8 1.3.4 Reference Designs. 1-9 Hardware Description . 1-9 1.4.1 CX81801 CX81801 Smart Modem. 1-9 1.4.2 Digital Isolation Barrier. 1-9 1.4.3 CX20493 CX20493 SmartDAA Line Side Device. 1-9 Commands . 1-10 2. Technical Specifications .2-1 2.1 2.2 102025G 102025G Serial DTE Interface Operation. 2-1 2.1.1 Automatic Speed/Format Sensing . 2-1 Establishing Data Modem Connections . 2-2 2.2.1 Telephone Number Directory. 2-2 2.2.2 Dialing . 2-2 2.2.3 Modem Handshaking Protocol . 2-2 2.2.4 Call Progress Tone Detection . 2-2 2.2.5 Answer Tone Detection. 2-2 2.2.6 Ring Detection. 2-2 2.2.7 Billing Protection . 2-2 2.2.8 Connection Speeds. 2-3 2.2.9 Automode . 2-3 Conexant iii SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 Data Mode . 2-3 2.3.1 Speed Buffering (Normal Mode) . 2-3 2.3.2 Flow Control . 2-4 2.3.3 Escape Sequence Detection. 2-4 2.3.4 BREAK Detection . 2-4 2.3.5 Telephone Line Monitoring. 2-4 2.3.6 Fall Forward/Fallback (V.90/V.34/V.32 bis/V.32) . 2-4 2.3.7 Retrain . 2-4 2.3.8 Programmable Inactivity Timer . 2-4 2.3.9 DTE Signal Monitoring (Serial DTE Interface Only) . 2-5 Modem-on-Hold . 2-5 Error Correction and Data Compression. 2-5 2.5.1 V.42 Error Correction . 2-5 2.5.2 MNP 2-4 Error Correction . 2-5 2.5.3 V.44 Data Compression. 2-5 2.5.4 V.42 bis Data Compression . 2-6 2.5.5 MNP 5 Data Compression . 2-6 MNP 10 Data Throughput Enhancement . 2-6 Telephony Extensions. 2-6 2.7.1 Line In Use Detection . 2-6 2.7.2 Extension Pickup Detection . 2-7 2.7.3 Remote Hangup Detection. 2-7 Fax Class 1 and Fax Class 1.0 Operation . 2-7 Voice/Audio Mode . 2-7 2.9.1 Online Voice Command Mode . 2-7 2.9.2 Voice Receive Mode . 2-7 2.9.3 Voice Transmit Mode . 2-8 2.9.4 Full-Duplex Receive and Transmit Mode . 2-8 2.9.5 Audio Mode . 2-8 2.9.6 Tone Detectors . 2-8 2.9.7 Speakerphone Modes. 2-8 Caller ID . 2-8 Worldwide Country Support . 2-9 Diagnostics . 2-10 2.12.1 Commanded Tests. 2-10 2.12.2 Power On Reset Tests . 2-10 Low Power Sleep Mode . 2-10 3. Hardware Interface .3-1 3.1 CX81801 CX81801 Smart Modem Hardware Pins and Signals . 3-1 3.1.1 CX81801 CX81801 Smart Modem Signal Summary . 3-1 3.1.1.1 3.1.2 iv LSD Interface (Through DIB). 3-1 3.1.1.2 Call Progress Speaker Interface . 3-1 3.1.1.3 Serial DTE Interface and Indicator Outputs . 3-1 CX81801 CX81801 Smart Modem Pin Assignments and Signal Definitions . 3-2 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.2 CX20493 CX20493 LSD Hardware Pins and Signals . 3-7 3.2.1 CX20493 CX20493 LSD Signal Summary. 3-7 3.2.1.1 Voltage References. 3-7 3.2.1.4 3.4 Telephone Line Interface . 3-7 3.2.1.3 3.3 Smart Modem Interface (Through DIB) . 3-7 3.2.1.2 General Purpose Input/Output. 3-8 3.2.1.5 No Connects . 3-8 3.2.2 CX20493 CX20493 LSD Pin Assignments and Signal Definitions . 3-8 Electrical and Environmental Specifications . 3-13 3.3.1 Operating Conditions, Absolute Maximum Ratings, and Power Requirements . 3-13 3.3.2 Interface and Timing Waveforms . 3-15 3.3.2.1 Serial DTE Interface. 3-15 Crystal Specifications . 3-16 4. Package Dimensions .4-1 102025G 102025G Conexant v SmartV.XX Modem with 28-Pin CTLGA Data Sheet Figures Figure 1-1. SmartV.XX Modem Simplified Interface Diagram . 1-3 Figure 3-1. CX81801 CX81801 Smart Modem Hardware Signals . 3-2 Figure 3-2. CX81801 CX81801 Smart Modem 28-Pin CTLGA Pin Signals . 3-3 Figure 3-3. CX20493 CX20493 LSD Hardware Interface Signals . 3-8 Figure 3-4. CX20493 CX20493 LSD 28-Pin QFN Pin Signals. 3-9 Figure 3-5. Waveforms - Serial DTE Interface . 3-15 Figure 4-1. Package Dimensions - 28-Pin CTLGA . 4-1 Figure 4-2. Package Dimensions - 28-Pin QFN. 4-2 Tables Table 1-1. SmartV.XX Modem Models and Functions . 1-2 Table 1-2. Default Countries Supported. 1-8 Table 2-1. +MS Command Automode Connectivity . 2-3 Table 3-1. CX81801 CX81801 Smart Modem 28-Pin CTLGA Pin Signals. 3-3 Table 3-2. CX81801 CX81801 Smart Modem Pin Signal Definitions . 3-4 Table 3-3. CX81801 CX81801 Smart Modem I/O Type Definitions. 3-6 Table 3-4. CX81801 CX81801 Smart Modem DC Electrical Characteristics. 3-6 Table 3-5. CX20493 CX20493 LSD 28-Pin QFN Pin Signals . 3-9 Table 3-6. CX20493 CX20493 LSD Hardware Signal Definitions . 3-10 Table 3-7. CX20493 CX20493 LSD GPIO DC Electrical Characteristics . 3-12 Table 3-8. CX20493 CX20493 AVdd DC Electrical Characteristics. 3-12 Table 3-9. Operating Conditions . 3-13 Table 3-10. Absolute Maximum Ratings. 3-13 Table 3-11. Current and Power Requirements. 3-14 Table 3-12. Crystal Specifications. 3-16 vi Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet Revision History Changes Incorporated in Doc. No. 102025G 102025G 1. Section 1.1: Removed V.22 bis fast connect support. 2. Section 1.2.1: Removed V.22 bis fast connect support. 3. Section 1.3.3.1: Removed V.22 bis fast connect support. Changes Incorporated in Doc. No. 102025E 102025E 1. Figure 3-1: Revised pin 14 connection. 2. Table 3-2: Revised pin 14 definition. 3. Figure 4-1: Revised. 4. Figure 4-2: Revised. Changes Incorporated in Doc. No. 102025D 102025D Table 1-1: Revised part numbers. Changes Incorporated in Doc. No. 102025C 102025C Figure 3-2: Corrected signals on pins 15-28. 102025G 102025G Conexant vii SmartV.XX Modem with 28-Pin CTLGA Data Sheet This page is intentionally blank. viii Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 1. Introduction 1.1 Overview The Conexant SmartV.XX Modem supports 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 and serial host interface operation. Table 1-1 lists the available models. The modem operates with PSTN telephone lines worldwide. Conexant's SmartDAA technology (patent pending) eliminates the need for a costly analog transformer, relays, and opto-isolators typically used in discrete DAA (Data Access Arrangement) implementations The SmartDAA architecture also simplifies product implementation by eliminating the need for country-specific board configurations enabling worldwide homologation of a single modem board design and a single bill of materials (BOM). The SmartDAA system-powered DAA operates reliably without drawing power from the line, unlike line-powered DAAs which operate poorly when line current is insufficient due to long lines or poor line conditions. Enhanced features, such as monitoring of local extension status without going off-hook, are also supported. Incorporating Conexant's proprietary Digital Isolation Barrier (DIB) design (patent pending) and other innovative DAA features, the SmartDAA architecture simplifies application design, minimizes layout area, and reduces component cost. The SmartV.XX Modem device set, consisting of a CX81801 CX81801 Smart Modem in a 28-pin CTLGA and a CX20493 CX20493 SmartDAA LSD in a 28-pin QFN, supports data/fax/TAM operation with hardware-based modem controller, digital signal processing, and DAA/telephone line interface functions (Figure 1-1). The CX81801 CX81801 Smart Modem integrates modem controller (MCU), modem data pump (MDP), 256 KB ROM, 32 KB RAM, and SmartDAA system side device (SSD) functions onto a single die. Small packages with low profile and reduce voltage operation with low power consumption make this device set an ideal solution for embedded and palmtop applications using serial DTE interface. In V.90 (V.90+ models) data mode, the modem can receive data at speeds up to 56 kbps from a digitally connected V.90-compatible central site modem. A 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 V.34 rates. In V.34 data mode (V.90+ and V.34 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 102025G 102025G Conexant 1-1 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 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 kbpsconnection. Non-error-correcting mode is also supported. Fax Group 3 send and receive rates are supported up to 14.4 kbps with T.30 protocol. 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. This data sheet describes the modem capabilities. Commands and parameters are defined in the Commands Reference Manual (Doc. No. 100722). Table 1-1. SmartV.XX Modem Models and Functions Model/Order/Part Numbers Marketing Name Device Set Order No. Smart Modem [28-Pin CTLGA] Part No. Supported Functions Line Side Device (LSD) [28-Pin QFN] Part No. V.90 Data, V.34 Data QC, MOH V.32 bis Data, V.44 Data Compression, V.17 Fax, TAM, World-wide SmartV.90+ DS56-L147-091 DS56-L147-091 CX81801-64 CX81801-64 CX20493-21 CX20493-21 Y Y Y SmartV.34 DS28-L147-091 DS28-L147-091 CX81801-62 CX81801-62 CX20493-21 CX20493-21 - Y Y SmartV.32bis DS96-L147-091 DS96-L147-091 CX81801-63 CX81801-63 CX20493-21 CX20493-21 - - Y Notes: Supported functions (Y = Supported; - = Not supported). QC, MOH TAM FDSP 1-2 QuickConnect and Modem-on-Hold 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 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet Figure 1-1. SmartV.XX Modem Simplified Interface Diagram DAA Hardware CX81801 CX81801 Smart Modem 28-Pin CTLGA SmartDAA Interface Serial DTE Interface CX20493 CX20493 (28-Pin QFN) SmartDAA Line Side Device (LSD) Digital Isolation Barrier (DIB) Components Rectifier and Filter Components Microcontroller Unit (MCU) Line Side DIB Interface (LSDI) Codec Telephone Line Interface TELEPHONE LINE TIP RING Modem Data Pump (MDP) RAM (32K x 8) Digital Speaker Circuit (Optional) SOUNDUCER ROM (256K x 8) 102025_001 102025G 102025G Conexant 1-3 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 1.2 Features 1.2.1 General Modem Features · · · · · · · · · · · · · · · · · 1-4 Data modem - QuickConnect and Modem-on-HoldTM functions (V.90+ models) - ITU-T V.90 (V.90+ models), V.34 (V.90+ and V.34 models), V.32bis, V.32, V.22 bis, V.22, V.23, and V.21; Bell 212A and Bell 103 - V.250 and V.251 commands Data compression and error correction - V.44 data compression - V.42 bis and MNP 5 data compression - V.42 LAPM and MNP 2-4 error correction Fax modem send and receive rates up to 14.4 kbps - V.17, V.29, V.27 ter, and V.21 channel 2 - EIA/TIA 578 Class 1 and T.31 Class 1.0 V.80 synchronous access mode supports host-controlled communication protocols with H.324 interface support Data/Fax/Voice call discrimination Hardware-based modem controller Hardware-based digital signal processor (DSP) Worldwide operation - Complies to TBR21 TBR21 and other country requirements - Caller ID detection for many countries - Call progress, blacklisting - Internal ROM includes default values for 29 countries - Additional modified country profiles can be stored in internal SRAM Caller ID detect - On-hook Caller ID detection - Off-hook Call Waiting Caller ID detection during data mode in V.90, V.34, V.32bis, and 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 Built-in DTE interface - Serial ITU-T V.24 (EIA/TIA-232-E EIA/TIA-232-E) logical interface up to 115.2 kbps Direct mode (serial DTE interface) Flow control and speed buffering Automatic format/speed sensing Serial async/sync data Thin packages support low profile designs (1.0 mm max. height) Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet · · 1.2.2 SmartDAA Features · · · · · · · · · · · · 1.2.3 System side powered DAA operates under poor line current supply conditions Modem Wake-on-Ring Ring detection Line polarity reversal detection Line current loss detection Pulse dialing Line-in-use detection during on-hook operation Remote hang-up detection for efficient call termination Extension pickup detection Call waiting detection Digital PBX line protection Meets worldwide DC VI masks requirements Applications · · · · · 102025G 102025G - CX81801 CX81801 Smart Modem in 28-pin CTLGA - CX20493 CX20493 LSD in 28-pin QFN +3.3V operation with +5V tolerant digital inputs Typical power use - 220 mW (Normal Mode); 56 mW (Sleep Mode) Embedded systems Handheld computers Gaming devices Point of sale terminals Remote monitoring and data collection systems Conexant 1-5 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 1.3 Technical Overview 1.3.1 General Description Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, and host DTE interface functions are supported and controlled through the V.250, V.251, and V.253-compatible command set. The OEM adds a crystal circuit, DIB components, telephone line interface, telephone handset/telephony extension interface, and other supporting discrete components as supported by the modem model (Table 1-1) and required by the application to complete the system. 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, voice/audio/TAM, worldwide, V.80, and serial DTE host interface functions according to modem models (Table 1-1). 1.3.3 1.3.3.1 Operating Modes Data/Fax Modes In V.90 data modem mode (V.90+ models), the modem can receive data from a digital source using a V.90-compatible central site modem 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 full-duplex V.34 mode and to lower rates as dictated by line conditions. The following modes are also supported in V.90+ models: · QuickConnect which allows quicker subsequent connection to a server using stored line parameters obtained during the initial connection. The server must support quick connect profiles. · 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. The server must support Modem-on-Hold functionality. In V.34 data modem mode (V.90+ and V.34 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. 1-6 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 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, or T.31 Fax Class 1.0 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.) 1.3.3.3 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 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. TAM Mode is supported by four submodes: · · · · 102025G 102025G Online Voice Command Mode supports connection to the telephone line. Voice Receive Mode supports recording voice or audio data input from the telephone line. Voice Transmit Mode supports playback of voice or audio data to the telephone line. Full-duplex Receive and Transmit Mode. Conexant 1-7 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 1.3.3.5 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. SmartDAA technology allows a single PCB design and single BOM to be homologated worldwide. Advanced features such as extension pickup detection, remote hang-up detection, line-in-use detection, and digital PBX detection are supported. Country code IDs are defined by ITU-T T.35. Internal ROM includes default profiles for 29 countries including TBR21-compliant profiles. Additional country profiles can be stored in internal SRAM (request additional country profiles from a Conexant Sales Office). Duplicate country profiles stored in internal SRAM will override the profiles in internal RAM firmware. The default countries supported are listed in Table 1-2. Table 1-2. Default Countries Supported Country Australia Austria Belgium Brazil China Denmark Finland France Germany Greece India Ireland Italy Japan Korea Malaysia Mexico Netherlands Norway Poland Portugal Singapore South Africa Spain Sweden Switzerland Taiwan United Kingdom United States 1-8 Country Code 09 0A 0F 16 26 31 3C 3D 42 46 53 57 59 00 61 6C 73 7B 82 8A 8B 9C 9F A0 A5 A6 FE B4 B5 Call Waiting Tone Detection (CW) Supported X X X X X X X X X X On-Hook Type 1 Caller ID (CID) Supported Off-Hook Type 2 Called ID (CID2) Supported X X X X X X X X X X X X X X X X X X X X X X X Conexant X X X X X X X X X 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 1.3.4 Reference Designs A data/fax/TAM reference design (RD01-Dxxx) for an external modem is available to minimize application design time, reduce development cost, and accelerate market entry. These designs are: 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. 1.4 Hardware Description SmartDAA technology (patent pending) eliminates the need for a costly analog transformer, relays, and opto-isolators that are typically used in discrete DAA implementations. The programmable SmartDAA architecture simplifies product implementation in worldwide markets by eliminating the need for country-specific components. 1.4.1 CX81801 CX81801 Smart Modem The CX81801 CX81801 Smart Modem, packaged in a 28-pin CTLGA, includes a Microcontroller (MCU), a Modem Data Pump (MDP), 256 KB internal ROM, 32 KB internal RAM, and SmartDAA interface functions. The Smart Modem connects to host via a logical V.24 (EIA/TIA-232-E EIA/TIA-232-E) serial DTE interface. The Smart Modem performs the command processing and host interface functions. The crystal frequency is 28.224 MHz. The Smart Modem performs telephone line signal modulation/demodulation in a hardware digital signal processor (DSP) which reduces computational load on the host processor. The SmartDAA Interface communicates with, and supplies power and clock to, the LSD through the DIB. 1.4.2 Digital Isolation Barrier The OEM-supplied Digital Isolation Barrier (DIB) electrically DC isolates the Smart Modem from the LSD and telephone line. The Smart Modem is connected to a fixed digital ground and operates with standard CMOS logic levels. The LSD is connected to a floating ground and can tolerate high voltage input (compatible with telephone line and typical surge requirements). The DIB transformer couples power and clock from the Smart Modem to the LSD. The DIB data channel supports bidirectional half-duplex serial transfer of data, control, and status information between the Smart Modem and the LSD over two lines. 1.4.3 CX20493 CX20493 SmartDAA Line Side Device The CX20493 CX20493 SmartDAA Line Side Device (LSD) includes a Line Side DIB Interface (LSDI), a coder/decoder (codec), and a Telephone Line Interface (TLI). 102025G 102025G Conexant 1-9 SmartV.XX Modem with 28-Pin CTLGA Data Sheet The LSDI communicates with, and receives power and clock from, the SmartDAA interface in the Smart Modem through the DIB. LSD power is received from the MDP PWRCLKP and PWRCLKN pins via the DIB through a half-wave rectifying diode and capacitive power filter circuit connected to the DIB transformer secondary winding. The CLK input is also accepted from the DIB transformer secondary winding through a capacitor and a resistor in series. Information is transferred between the LSD and the Smart Modem through the DIB_P and DIB_N pins. These pins connect to the Smart Modem DIB_DATAP and DIB_DATAN pins, respectively, through the DIB. The TLI integrates DAA and direct telephone line interface functions and connects directly to the line TIP and RING pins, as well as to external line protection components. Direct LSD connection to TIP and RING allows real-time measurement of telephone line parameters, such as the telephone central office (CO) battery voltage, individual telephone line (copper wire) resistance, and allows dynamic regulation of the off-hook TIP and RING voltage and total current drawn from the central office (CO). This allows the modem to maintain compliance with U.S. and worldwide regulations and to actively control the DAA power dissipation. 1.5 Commands The modem supports data modem, fax class 1 or 1.0 modem, voice/audio, full-duplex speakerphone (FDSP), MNP 10/MNP 10/MNP 10EC, and V.80 commands, and S Registers in accordance with modem model options. 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. Fax Modem 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. Voice/Audio Operation. Voice/audio mode functions operate in response to voice/audio commands when +FCLASS=8. 1-10 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA 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. 102025G 102025G Conexant 2-1 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.2 Establishing Data Modem Connections 2.2.1 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. 2.2.2 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. 2.2.3 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. 2.2.4 Call Progress Tone Detection Ringback, equipment busy, congested tone, warble tone, and progress tones can be detected in accordance with the applicable standard. 2.2.5 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. 2.2.6 Ring Detection A ring signal can be detected from a TTL-compatible 15.3 Hz to 68 Hz square wave input. 2.2.7 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. 2-2 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.2.8 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). 2.2.9 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 V.21 V.22 V.22 bis V.23 V.32 V.32 bis V34 V.34 V90 V.90 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 300 1200 Notes See Note 2 Default for V.32 bis models Default for V.34 models Default for V.90+ 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. 2.3 Data Mode Data mode exists when a telephone line connection has been established between modems and all handshaking has been completed. 2.3.1 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. 102025G 102025G Conexant 2-3 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.3.2 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. 2.3.3 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. 2.3.4 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. 2.3.5 Telephone Line Monitoring GSTN Cleardown (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). 2.3.6 Fall Forward/Fallback (V.90/V.34/V.32 bis/V.32) During initial handshake, the modem will fallback to the optimal line connection within 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.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. 2.3.7 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. 2.3.8 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 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.3.9 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. 2.4 Modem-on-Hold The Modem-on-Hold (MOH) function (V.90+ models only) 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 server supporting MOH. MOH can be executed through either of 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 online. 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. 2.5 Error Correction and Data Compression 2.5.1 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. 2.5.2 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. 2.5.3 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. 102025G 102025G Conexant 2-5 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.5.4 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 2-KB dictionaries are used to store the strings. These dictionaries are dynamically updated during normal operation. 2.5.5 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 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. 2.7 Telephony Extensions The following telephony extension features are supported and can be typically be implemented in designs for set-top box applications and TAM software applications to enhance end-user experience: · · · 2.7.1 Line In Use detection Extension Pickup detection Remote Hang-up detection Line In Use Detection The Line In Use Detection feature can stop the modem from disturbing the phone line when the line is already being used. When an automated system tries to dial using ATDT and the phone line is in use, the modem will not go off hook and will respond with the message "LINE IN USE". 2-6 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.7.2 Extension Pickup Detection The Extension Pickup Detection feature (also commonly referred as PPD or Parallel phone detection) allows the modem to detect when another telephony device (i.e., fax machine, phone, satellite/cable box) is attempting to use the phone line. This feature can be used to quickly drop a modem connection in the event when a user picks up a extension phone line. For example, this feature allows set top boxes with an integrated SmartV.XX modem to give normal voice users the highest priority over the telephone line. This feature can also be used in Telephone Answering Machine applications (TAM). Its main use would be to stop the TAM operation when a phone is picked up. 2.7.3 Remote Hangup Detection The Remote Hangup Detection feature will cause the modem go back onhook during a data connection when the remote modem is disconnected for abnormal termination reasons (remote phone line unplugged, remote server/modem shutdown. For Voice applications, this method can be used in addition to silence detection to determine when a remote caller has hung up to terminate a voice recording. 2.8 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. 2.9 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. 2.9.1 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. 2.9.2 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. 102025G 102025G Conexant 2-7 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 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. 2.9.3 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. 2.9.4 Full-Duplex Receive and Transmit Mode This mode is entered when the +VTR command is active in order to concurrently receive and transmit voice. 2.9.5 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. 2.9.6 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. 2.9.7 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. 2.10 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 2.11). 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. 2-8 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 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.90, V.34, V.32bis, or V.32. 2.11 Worldwide Country Support Internal modem firmware supports 29 country profiles (see Section 1.3.2). These country profiles include the following country-dependent parameters: · · · · · · · · · · · 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. 102025G 102025G Conexant 2-9 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 2.12 Diagnostics 2.12.1 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. 2.12.2 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 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. 2.13 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 or the DTE sends a character to the modem. 2-10 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3. Hardware Interface 3.1 CX81801 CX81801 Smart Modem Hardware Pins and Signals 3.1.1 CX81801 CX81801 Smart Modem Signal Summary 3.1.1.1 LSD Interface (Through DIB) The DIB interface signals are: · · · · 3.1.1.2 Clock and Power Positive (PWRCLKP); output Clock and Power Negative (PWRCLKN); output Data Positive (DIB_DATAP); input/output Data Negative (DIB_DATAN); input/output Call Progress Speaker Interface The call progress speaker interface signal is: · Digital speaker output (DSPKOUT); output DSPKOUT is a square wave output in Data/Fax mode used for call progress or carrier monitoring. This output can be optionally connected to a low-cost on-board speaker, e.g., a sounducer, or to an analog speaker circuit. 3.1.1.3 Serial DTE Interface and Indicator Outputs The supported DTE interface signals are: · · · · · · · Serial Transmit Data input (TXD#) Serial Receive Data output line (RXD#) Clear to Send output (CTS#) Received Line Signal Detector (RLSD#) Ring Indicator (RI#) Data Terminal Ready control input (DTR#) Request to Send control input (RTS#) Additional clock signals provided for synchronous mode are: · · 102025G 102025G Receive Data Clock (RXCLK#) Transmit Data Clock (TXCLK#) Conexant 3-1 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.1.2 CX81801 CX81801 Smart Modem Pin Assignments and Signal Definitions CX81801 CX81801 Smart Modem 28-pin CTLGA hardware interface signals 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 1-1. CX81801 CX81801 Smart Modem hardware interface signals are defined in Table 3-2. I/O types are defined in Table 3-3. DC electrical characteristics are listed in Table 3-4. Figure 3-1. CX81801 CX81801 Smart Modem Hardware Signals 7 22 +3.3V 3 RESET CIRCUIT VDD VDD VDD_CORE VDD_CORE RESET# PWRCLKP PWRCLKN DIB_DATAP DIB_DATAN +3.3V 47K 47K 5 4 11 17 18 12 10 SERIAL DTE INTERFACE 8 6 SERIAL DTE SYNCHRONOUS CLOCKS 1 2 CRYSTAL CIRCUIT 240K +3.3V 23 9 15 16 19 25 TXD# RXD# CTS# RLSD# RI# DTR# RTS# CX81801 CX81801 Smart Modem 28-Pin CTLGA DSPKOUT RESERVED 13 24 26 27 20 21 28 DIGITAL ISOLATION BARRIER (DIB) SPEAKER CIRCUIT 14 TXCLK# RXCLK# XTLI XTLO LPO GND GND GND GND GND 102025_002 3-2 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet Figure 3-2. CX81801 CX81801 Smart Modem 28-Pin CTLGA Pin Signals XTLI XTLO RESET# RXD# TXD# RXCLK# VDD TXCLK# GND RTS# CTS# DTR# VDD_CORE RESERVED 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CX81801 CX81801 DSPKOUT PWRCLKN 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PWRCLKP GND VDD_CORE LPO VDD DIB_DATAN DIB_DATAP GND RI# RLSD# GND GND Top View 102025_003 Table 3-1. CX81801 CX81801 Smart Modem 28-Pin CTLGA Pin Signals Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 102025G 102025G Signal Name XTLI XTLO RESET# RXD# TXD# RXCLK# VDD TXCLK# GND RTS# CTS# DTR# VDD_CORE RESERVED Conexant Pin No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Signal Name GND GND RLSD# RI# GND DIB_DATAP DIB_DATAN VDD LPO VDD_CORE GND PWRCLKP PWRCLKN DSPKOUT 3-3 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-2. CX81801 CX81801 Smart Modem Pin Signal Definitions Label Pin I/O I/O Type Signal Name/Description System XTLI XTLO 1 2 I O Ix, Ox Crystal In and Crystal Out. Connect XTLI and XTLO to the external 28.224 MHz ± 0.01% crystal circuit. RESET# 3 I It Reset. The active low RESET# input resets the Smart Modem logic and clears the internal SRAM. 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#. VDD 7, 22 P PWR Digital Supply Voltage. Connect to VCC (+3.3V, filtered). VDD_CORE 13, 24 P PWR Core Voltage. GND 9, 15, 16, 19, 25 G GND Digital Ground. Connect to digital ground (GND). LPO 23 I I/O Low Power Oscillator. Connect to +3.3V through 240 K. Speaker Interface DSPKOUT 28 O It/Ot2 Modem Speaker Digital Output. The DSPKOUT digital output reflects the received analog input signal digitized to TTL high or low level by an internal comparator. DIB Interface PWRCLKP 26 O Odpc Clock and Power Positive. Provides clock and power to the LSD. Connect to DIB transformer primary winding non-dotted terminal. PWRCLKN 27 O Odpc Clock and Power Negative. Provides clock and power to the LSD. Connect to DIB transformer primary winding dotted terminal. DIB_DATAP 20 I/O Idd/Odd Data Positive. Transfers data, control, and status information between the Smart Modem and the LSD. Connect to LSD through DIB data positive channel components. DIB_DATAN 21 I/O Idd/Odd Data Negative. Transfers data, control, and status information between the Smart Modem and the LSD. Connect to LSD through DIB data negative channel components. Reserved RESERVED 14 I Itpu Reserved. Connect to GND. 3-4 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-2. CX81801 CX81801 Smart Modem Pin Signal Definitions (Continued) Label Pin I/O I/O Type Signal Name/Description V.24 (EIA/TIA-232-E EIA/TIA-232-E) DTE Serial Interface TXD# (PA2) 5 I It/Ot2 Transmitted Data (EIA BA/ITU-T CT103 CT103). The DTE uses the TXD# line to send data to the modem for transmission over the telephone line or to transmit commands to the modem. RXD# (PA6) 4 O It/Ot2 Received Data (EIA BB/ITU-T CT104 CT104). The modem uses the RXD# line to send data received from the telephone line to the DTE and to send modem responses to the DTE. During command mode, RXD# data represents the modem responses to the DTE. CTS# (PC1) 11 O Ith/Ot8 Clear To Send (EIA CB/ITU-T CT106 CT106). CTS# output ON (low) indicates that the modem is ready to accept data from the DTE. In asynchronous operation, in error correction or normal mode, CTS# is always ON (low) unless RTS/CTS flow control is selected by the &Kn command. In synchronous operation, the modem also holds CTS# ON during asynchronous command state. The modem turns CTS# OFF immediately upon going off-hook and holds CTS# OFF until both DSR# and RLSD# are ON and the modem is ready to transmit and receive synchronous data. The modem can also be commanded by the &Rn command to turn CTS# ON in response to an RTS# OFF-to-ON transition. RLSD# (PC2) 17 O Ith/Ot8 Received Line Signal Detector (EIA CF/ITU-T CT109 CT109). When AT&C0 command is not in effect, RLSD# output is ON when a carrier is detected on the telephone line or OFF when carrier is not detected. RI# (PC5) 18 O Ith/Ot8 Ring Indicator (EIA CE/ITU-T CT125 CT125). RI# output ON (low) indicates the presence of an ON segment of a ring signal on the telephone line. DTR# (PD4) 12 I It Data Terminal Ready (EIA CD/ITU-T CT108 CT108). The DTR# input is turned ON (low) by the DTE when the DTE is ready to transmit or receive data. DTR# ON prepares the modem to be connected to the telephone line, and maintains the connection established by the DTE (manual answering) or internally (automatic answering). DTR# OFF places the modem in the disconnect state under control of the &Dn and &Qn commands. RTS# (PD6) 10 I Ithpu Request To Send (EIA CA/ITU-T CT105 CT105). RTS# input ON (low) indicates that the DTE is ready to send data to the modem. In the command state, the modem ignores RTS#. In asynchronous operation, the modem ignores RTS# unless RTS/CTS flow control is selected by the &Kn command. In synchronous on-line operation, the modem can be commanded by the &Rn command to ignore RTS# or to respond to RTS# by turning on CTS# after the delay specified by Register S26. RXCLK# (P_PB01) 6 O Itpu/Ot2 Receive Data Clock. A synchronous Receive Data Clock (RXCLK) is output in synchronous modes. The RXCLK frequency is the data rate (±0.01%) with a duty cycle of 50±1%. Leave open if not used. TXCLK# (P_PA04) 8 O Itpu/Ot2 Transmit Data Clock. A synchronous Transmit Data Clock (TXCLK) is output in synchronous modes. The TXCLK frequency is the data rate (±0.01%) with a duty cycle of 50±1%. Leave open if not used. Notes: 1. I/O Types: See Table 3-3. 2. Interface Legend: DIB Digital Isolation Barrier NC No internal pin connection RESERVED = No external connection allowed (may have internal connection). 102025G 102025G Conexant 3-5 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-3. CX81801 CX81801 Smart Modem I/O Type Definitions I/O Type Idd/Odd Ix/Ox It/Ot2 Digital input/output, DIB data transceiver I/O, wire Description Itpu/Ot2 Digital input, +5V tolerant, 75k pull up/ Digital output, 2 mA, ZINT = 120 Ith/Ot8 Digital input, +5V tolerant, hysteresis/Digital output, 8 mA, ZINT = 50 It Ith Itpu Digital input, +5V tolerant Digital input, +5V tolerant, hysteresis Digital input, +5V tolerant/ Digital output, 2 mA, ZINT = 120 Digital input, +5V tolerant, 75k pull up Digital input, +5V tolerant, hysteresis, 75k pull up Odpc Digital output with adjustable drive, DIB clock and power PWR VCC Power GND Ground NOTES: 1. See DC characteristics in Table 3-4. 2. I/O Type corresponds to the device Pad Type. The I/O column in signal interface tables refers to signal I/O direction used in the application. Ithpu Table 3-4. CX81801 CX81801 Smart Modem DC Electrical Characteristics Parameter Symbol Input Voltage Low +5V tolerant +5V tolerant hysteresis Input Voltage High +5V tolerant +5V tolerant hysteresis Input Hysteresis +3V hysteresis +5V tolerant, hysteresis Output Voltage Low VIL Min. Typ. Max. Units 0 0 0.8 0.3 *VGG 5.25 5.25 0.5 0.3 ­ ­ ­ ­ ­ ­ ­ ­ V V V V V V V V 0 ­ 0.4 V IOL = 2 mA 0 ­ 0.4 V IOL = 8 mA ZINT = 120 2.4 ­ ­ VDD V V IOL = -2 mA ZINT = 50 Pull-Up Resistance 2.4 ­ VDD V IOL = -8 mA Rpu 50 ­ 200 k Pull-Down Resistance Rpd 50 ­ 200 VIH 2 0.7 * VDD VH VOL ZINT = 120 ZINT = 50 Output Voltage High Test Conditions VOH k Test Conditions unless otherwise stated: VDD = +3.3 ± 0.3 VDC; TA = 0°C to 70°C; external load = 50 pF. 3-6 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.2 CX20493 CX20493 LSD Hardware Pins and Signals 3.2.1 CX20493 CX20493 LSD Signal Summary 3.2.1.1 Smart Modem Interface (Through DIB) The DIB interface, power, and ground signals are: · · · · · · · · 3.2.1.2 Clock (CLK, pin 26); input Digital Power (PWR+, pin 7); unregulated input power Regulated Digital Voltage Supply (DVdd, pin 24) Digital Ground (DGnd, pin 23); digital ground Regulated Analog Voltage Supply (AVdd, pin 2) Analog Ground (AGnd, pin 6); analog ground Data Positive (DIB_P, pin 27); input/output Data Negative (DIB_N, pin 28); input/output Telephone Line Interface The telephone line interface signals are: · · · · · · · · · · · · · 3.2.1.3 RING 1 AC Coupled (RAC1, pin 21); input TIP 1 AC Coupled (TAC1, pin 20); input RING 2 AC Coupled (RAC2, pin 19); input TIP 2 AC Coupled (TAC2, pin 18); input TIP and RING DC Measurement (TRDC, pin 12); input Electronic Inductor Capacitor (EIC, pin 11) Electronic Inductor Output (EIO, pin 17) Electronic Inductor Feedback (EIF, pin 16) Receive Analog Input (RXI, pin 9); input Transmit Output (TXO, pin 14); output Transmit Feedback (TXF, pin 13); input Virtual Impedance 0 (VZ, pin 10); input Electronic Inductor Ground (DC_GND, pin 15) Voltage References There are three reference voltage pins: · · · 102025G 102025G Output Middle (Center) Reference Voltage (Vc, pin 3); output for decoupling Output Reference Voltage (VRef, pin 4); output for decoupling Bias Resistor (RBias, pin 5); input Conexant 3-7 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.2.1.4 General Purpose Input/Output There is one unassigned general purpose input/output pin: · 3.2.1.5 General Purpose Input/Output 1 (GPIO1, pin 1); input/output No Connects Three pins are not used: · · · 3.2.2 No Connect 1 (NC1, pin 8); no internal connection No Connect 2 (NC2, pin 22); no internal connection No Connect 3 (NC3, pin 25); no internal connection CX20493 CX20493 LSD Pin Assignments and Signal Definitions CX20493 CX20493 LSD hardware interface signals are shown by major interface in Figure 3-3, are shown by pin number in Figure 3-4, and are listed by pin number in Table 3-5. CX20493 CX20493 LSD hardware interface signals are defined in Table 3-6. CX20493 CX20493 LSD GPIO DC electrical characteristics are specified in Table 3-7. CX20493 CX20493 LSD AVdd DC electrical characteristics are listed in Table 3-8. Figure 3-3. CX20493 CX20493 LSD Hardware Interface Signals RAC2 TAC2 24 AVdd RAC1 TAC1 DVdd 19 18 21 20 C978 C986 DIGITAL ISOLATION BARRIER (DIB) DGND_LSD PCLK2 R932 CLK2 26 FB906 FB906 BR904 BR904 CC POWER AND CLOCK CHANNEL R950 2 PWRCLKN C962 R952 PWRCLKP 7 C992 R922 C970 C982 C972 C930 PWR+ AVdd C928 6 BR908 BR908 C952 CLK DVdd R988 R990 AGnd CX20493 CX20493 SmartDAA 3 Line Side Device (LSD) 28-Pin QFN RXI Safety and EMI Protection Impedance Matching and Transmitter 5 R954 VRef 28 4 DIB_P C922 DIB_DATAN Vc 3 DIB_N C944 C924 29 15 23 AGND_LSD C974 C940 C976 PADDLE DC_GND DGND GND_TIE U908 component placement and values, and for layout guidelines. AGND_LSD TIP RING Receive Coupling 10 14 13 Telephone Line Connector AGND_LSD 27 Consult applicable reference design for exact 9 AGND_LSD DIB_DATAP NOTE: Electronic Inductor, Off-Hook, Pulse Dial, and TIP and RING VI Control AGND_LSD VZ TXO TXF RBias DATA CHANNEL 11 12 17 16 Ring Filter C926 BR904 BR904 AC1 C950 EIC TRDC EIO EIF DGND_LSD On-hook Monitor (Optional) AGND_LSD GPIO1 NC1 NC2 NC3 1 8 22 25 NC NC NC NC DGND_LSD 101701_006 3-8 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet DVdd NC2 22 NC3 25 DGnd CLK 26 23 DIB_P 27 24 DIB_N 28 Figure 3-4. CX20493 CX20493 LSD 28-Pin QFN Pin Signals GPIO1 1 21 RAC1 AVdd 2 20 TAC1 Vc 3 19 RAC2 Vref 4 18 TAC2 17 EIO 16 EIF 15 DC_GND 5 6 7 9 10 11 12 13 14 RXI VZ EIC TRDC TXF TXO PWR+ CX20493 CX20493 8 AGnd NC1 RBias 101701A 101701A_007 Table 3-5. CX20493 CX20493 LSD 28-Pin QFN Pin Signals Pin Signal Label 1 2 3 4 5 Pin Signal Label 15 DC_GND AVdd 16 EIF Vc 17 EIO VRef RBias 18 19 TAC2 RAC2 6 AGnd 20 TAC1 7 PWR+ 21 RAC1 8 NC1 22 NC2 9 RXI 23 DGnd 10 11 VZ EIC 24 25 DVdd NC3 12 TRDC 26 CLK 13 TXF 27 DIB_P 14 102025G 102025G GPIO1 TXO 28 DIB_N Conexant 3-9 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-6. CX20493 CX20493 LSD Hardware Signal Definitions Label Pin I/O I/O Type Signal Name/Description System Signals Regulated Power Output. Provides external power for LSD digital circuits and a connection point for external decoupling. (AVdd is routed internally to LSD analog circuits.) See PWR+ pin description. Connect to LSD DVdd pin, connect to AGND_LSD through C928, C930, and C972 in parallel. C928, C930, and C972 must be placed close to pins 2 and 6. C930 must have ESR < 2 . AVdd 2 PWR PWR AGnd 6 AGND_LSD AGND_LSD VRef 4 REF REF Vc 3 REF REF PWR+ 7 PWR PWR DVdd 24 PWR PWR DGnd 23 DGND_LSD DGND_LSD LSD Digital Ground. Connect to DGND_LSD, and to AGND_LSD at the DGND_LSD/AGND_LSD tie point (U908). PADDLE - AGND_LSD AGND_LSD Paddle Ground. Referred to as pin 29 in schematics. Connect to AGND_LSD. CLK 26 I I DIB_P 27 I/O I/O Data and Control Positive. Connect to DIB_DATAP through C922. DIB_P and DIB_N signals are differential and half-duplex bidirectional. DIB_N 28 I/O I/O Data and Control Negative. Connect to DIB_DATAN through C924. DIB_P and DIB_N signals are differential and half-duplex bidirectional. 3-10 Analog Ground. Connect to DIB transformer secondary winding undotted terminal through diode D902 and R922 in series and to AGND_LSD. Output Reference Voltage. Connect to AGND_LSD through C940 and C976, which must be placed close to pin 4. Ensure a very close proximity between C940 and the VRef pin. C940 must have a maximum ESR of 2 . Output Middle Reference Voltage. Connect to AGND_LSD through C944 and C974, which must be placed close to pin 3. Ensure a very close proximity between C944 and the Vc pin. Use a short path and a wide trace to AGND_LSD pin. Unregulated Power Input. Provides unregulated input power to the LSD. PWR+ pin is an input which takes unregulated +3.2 V to +4.5 V from the DIB power supply made up of the transformer, diode, and filter capacitors. The PWR+ input is regulated by an internal linear regulator to +3.3 V ± 5% which is routed to the AVdd pin. If PWR+ is less than +3.4 V, then AVdd is equal to the unregulated PWR+ input value minus 150 mV. Connect to DIB transformer secondary winding dotted terminal through FB906 FB906 and BR904 BR904. Connect transformer side of FB906 FB906 to AGND_LSD though C970 and C982 in parallel. Place FB906 FB906, C970, and C982 close to pin 7 and pin 6 (AGnd). Digital Power Input. Input power for LSD digital circuits. Connect to LSD AVdd pin and connect to DGND_LSD through C978. Place C978 near pin 24. DIB Interface Signals Clock. Provides input clock, AC coupled to the LSD. Connect to DIB transformer secondary winding undotted terminal through C926 (closest to the CX20493 CX20493), R932, then R922 in series. Connect the R932 and R922 node to BR908 BR908. Place C926 near pin 26 and place R932 near C926. Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-6. CX20493 CX20493 LSD Hardware Signal Definitions (Continued) Label Pin I/O I/O Type RAC1 TAC1 21 20 I I Ia Ia RAC2 TAC2 19 18 I I Ia Ia EIC 11 O Oa TRDC 12 I Ia EIO 17 O Oa DC_GND 15 GND AGND_LSD EIF 16 I Ia RXI 9 I Ia RBias 5 I Ia VZ 10 I Ia TXO 14 O Oa TXF 13 I Ia I/O It/Ot12 GPIO1 1 NC1 8 NC2 22 NC3 25 Notes: 1. I/O types*: Ia It Oa Ot12 Signal Name/Description TIP and RING Interface RING1 AC Coupled and TIP1 AC Coupled. AC-coupled voltage from telephone line used to detect ring. Connect RAC1 to the diode bridge AC node (RING) through R902 (connects to pin 21) and C902 in series. Connect TAC1 to the diode bridge AC node (TIP) through R904 (connects to pin 20) and C904 in series. RING2 AC Coupled and TIP2 AC Coupled. AC-coupled voltage from telephone line used to optionally detect signal while on-hook. Connect RAC2 to the diode bridge AC node (RING) through R948 (connects to pin 19) and C948. Leave open if not used. Connect TAC2 to the diode bridge AC node (TIP) through R946 (connects to pin 21) and C946. Leave open if not used. Electronic Inductor Capacitor Switch. Internally switched to TRDC when pulse dialing. Connect to AGND_LSD through C958. TIP and RING DC Measurement. Input on-hook voltage (from a resistive divider). Used internally to extract TIP and RING DC voltage and Line Polarity Reversal (LPR) information. Connect to AGND_LSD through C918 and to the Bridge CC node through R906. R906 and C918 must be placed very close to pin 12. Electronic Inductor Output. Calculated voltage is applied to this output to control off-hook and DC VI mask operation. Connect to base of Q902. LSD Electronic Inductor Ground. Connect to AGND_LSD and to the GND_LSD/AGND_LSD tie point (U908). Electronic Inductor Feedback. Connect to emitter of Q904 through R968. Receive Analog Input. Receiver operational amplifier inverting input. AC coupled to the Bridge CC node through R910 (connects to pin 9) and C912 in series. R910 and C912 must be placed very close to pin 9. The length of the PCB trace connecting R910 to the RXI pin must be kept at an absolute minimum. Receiver Bias. Connect to AGND_LSD through R954, which must be placed close to pin 5. Virtual Impedance. Input signal used to provide line complex impedance matching for worldwide countries. AC coupled to Bridge CC node through R908 (connects to pin 10) and C910 in series. R908 and C910 must be placed very close to pin 10. The length of the PCB trace connecting R908 to the VZ pin must be kept at an absolute minimum. Transmit Output. Outputs transmit signal and impedance matching signal; connect to base of transmitter transistor Q906. Transmit Feedback. Connect to emitter of transmitter transistor Q906. Not Used General Purpose I/O 1. Leave open if not used. No Connect. No internal connection. Leave open. No Connect. No internal connection. Leave open. No Connect. No internal connection. Leave open. Analog input Digital input, TTL-compatible Analog output Digital output, TTL-compatible, 12 mA, ZINTERNAL = 32 AGND_LSD Isolated LSD Analog Ground GND_LSD Isolated LSD Digital Ground *See CX20493 CX20493 LSD GPIO DC Electrical Characteristics (Table 3-7) 2. Refer to applicable reference design for exact component placement and values. 102025G 102025G Conexant 3-11 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-7. CX20493 CX20493 LSD GPIO DC Electrical Characteristics Parameter Symbol VIN Min. -0.30 Typ. ­ Max. 3.465 VIL VIH ­ ­ 1.0 V Input Voltage High 1.6 ­ ­ V Output Voltage Low VOL 0 ­ 0.33 V Input Voltage Input Voltage Low Units V Test Conditions DVdd = +3.465V Output Voltage High VOH 2.97 ­ ­ V Input Leakage Current ­ -10 ­ 10 µA Output Leakage Current (High Impedance) ­ -10 ­ 10 µA GPIO Output Sink Current at 0.33 V maximum ­ 2.4 ­ mA GPIO Output Source Current at 2.97 V minimum ­ 2.4 ­ mA GPIO Rise Time/Fall Time 20 100 ns Test Conditions unless otherwise stated: DVdd = +3.3V +5%; TA = 0°C to 70°C; external load = 50 pF Table 3-8. CX20493 CX20493 AVdd DC Electrical Characteristics PWR+ Input +3.4V < PWR+ < +4.5V AVdd Output +3.3V ± 5% +3.2V < PWR+ < +3.39V 3.05V < AVdd < 3.24V See PWR+, AVdd, and DVdd descriptions in Table 3-6. 3-12 Conexant 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.3 Electrical and Environmental Specifications 3.3.1 Operating Conditions, Absolute Maximum Ratings, and Power Requirements The operating conditions are specified in Table 3-9. The absolute maximum ratings are listed in Table 3-10. The current and power requirements are listed in Table 3-11. Table 3-9. Operating Conditions Parameter Supply Voltage Operating Ambient Temperature Symbol VDD T A Limits +3.0 to +3.6 0 to +70 Units VDC °C Symbol VDD V IN T STG V IN V HZ Limits -0.5 to +4.0 -0.5 to (VGG +0.5)* Units VDC VDC -55 to +125 °C -0.3 to (VAA + 0.5) VDC -0.5 to (VGG +0.5)* VDC ±20 mA ±20 mA ±2500 VDC ±400 mA Table 3-10. Absolute Maximum Ratings Parameter Supply Voltage Input Voltage Storage Temperature Range Analog Inputs Voltage Applied to Outputs in High Impedance (Off) State DC Input Clamp Current I DC Output Clamp Current I Static Discharge Voltage (25°C) V Latch-up Current (25°C) I IK OK ESD TRIG * VGG = +3.3V ± 0.3V or +5V ± 5%. Handling CMOS Devices The device contains circuitry to protect the inputs against damage due to high static voltages. However, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltage. An unterminated input can acquire unpredictable voltages through coupling with stray capacitance and internal cross talk. Both power dissipation and device noise immunity degrades. Therefore, all inputs should be connected to an appropriate supply voltage. Input signals should never exceed the voltage range from -0.5V to VGG + 0.5V. This prevents forward biasing the input protection diodes and possibly entering a latch up mode due to high current transients. 102025G 102025G Conexant 3-13 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Table 3-11. Current and Power Requirements Mode Typical Current (Ityp) (mA) 66 61 17 Maximum Current (Imax) (mA) 73 67 19 Typical Power (Ptyp) (mW) 220 200 56 Maximum Power (Pmax) (mW) 240 220 63 Normal Mode: Off-hook, normal data connection Normal Mode: On-hook, idle, waiting for ring Sleep Mode Notes: 1. Operating voltage: VDD = +3.3V ± 0.3V. 2. Test conditions: VDD = +3.3V for typical values; VDD = +3.6V for maximum values. 3. Input Ripple 0.1 Vpeak-peak. 4. f = Internal frequency. 5. Maximum current computed from Ityp: Imax = Ityp * 1.1. 6. Typical power (Ptyp) computed from Ityp: Ptyp = Ityp * 3.3V; Maximum power (Pmax) computed from Imax: Pmax = Imax * 3.6V. 3-14 Conexant Notes f = 28.224 MHz f = 28.224 MHz f = 0 MHz 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.3.2 3.3.2.1 Interface and Timing Waveforms Serial DTE Interface The serial DTE interface waveforms for 4800 and 9600 bps are illustrated in Figure 3-5. Figure 3-5. Waveforms - Serial DTE Interface TXCLK 4800 BPS TXD 4800 BPS TXCLK 9600 BPS TXD 9600 BPS NOTE: THIS FIGURE IS VALID FOR SYNCHRONOUS MODE ONLY. THERE IS NO RELATIONSHIP BETWEEN NOTE: TXD AND TXCLK IN ASYNCHRONOUS MODE. a. Transmit RXCLK 4800 BPS RXD 4800 BPS RXCLK 9600 BPS RXD 9600 BPS NOTE: THIS FIGURE IS VALID FOR SYNCHRONOUS MODE ONLY. THERE IS NO RELATIONSHIP BETWEEN NOTE: RXD AND RXCLK IN ASYNCHRONOUS MODE. b. Receive 102025G 102025G Conexant 1227F3-14 1227F3-14 WF-Ser DTE 3-15 SmartV.XX Modem with 28-Pin CTLGA Data Sheet 3.4 Crystal Specifications Crystal specifications are listed in Table 3-12. Table 3-12. Crystal Specifications Characteristic Frequency Calibration Tolerance Frequency Stability vs. Temperature Frequency Stability vs. Aging Oscillation Mode Calibration Mode Load Capacitance, C L Shunt Capacitance, C O Series Resistance, R 1 Drive Level Operating Temperature Storage Temperature 3-16 Conexant Value 28.224 MHz nominal ±50 ppm at 25°C (C = 16.5 and 19.5 pF) L ±35 ppm (0°C to 70°C) ±20 ppm/5 years Fundamental Parallel resonant 18 pF nom. 7 pF max. 35-60 max. @20 nW drive level 100µW correlation; 500µW max. 0°C to 70°C ­40°C to 85°C 102025G 102025G SmartV.XX Modem with 28-Pin CTLGA Data Sheet 4. Package Dimensions The 28-pin CTLGA package dimensions are shown in Figure 4-1. The 28-pin QFN package dimensions are shown in Figure 4-2. Figure 4-1. Package Dimensions - 28-Pin CTLGA A D DETAIL A A3 b1 Pin 1 Identifier A1 Pin 1 Identifier 28 4 24 5 23 6 22 7 21 E 3 25 e 2 26 b 1 27 8 20 9 19 10 18 11 17 12 16 13 15 14 L TOP VIEW BOTTOM VIEW SEATING PLANE L1 Dimensions (millimeters) A A3 A1 DETAIL A Symbol Min. A 0.70 A1 0.00 A3 0.55 b 0.35 b1 0.65 e 0.60 L 1.245 L1 0.420 D 6.35 E 10.95 Ref. GP00-D764 GP00-D764 Nom. 0.80 0.01 0.60 0.40 0.70 0.65 1.275 0.450 6.40 11.00 Max. 0.90 0.05 0.65 0.45 0.75 0.70 1.305 0.480 6.45 11.05 PD_GP00_D764 102025G 102025G Conexant 4-1 SmartV.XX Modem with 28-Pin CTLGA Data Sheet Figure 4-2. Package Dimensions - 28-Pin QFN D NOTE 3 A D1 A1 D2 A2 A3 28 28 Pin 1 Identifier Pin 1 Identifier 1 1 2 3 3 2 E1 E2 E L b e TOP VIEW SEATING PLANE NOTE 1 BOTTOM VIEW C C Dimensions (Millimeters) C L Symbol A1 10 b NOTE 1 e SECTION "C-C" SCALE: NONE TERMINAL TIP NOTES: 1. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.20 AND 0.25mm FROM TERMINAL TIP. 2. PACKAGE WARPAGE MAX 0.05mm. Min. Nom. e 0.5 BSC 0.60 0.50 L 0.23 0.28 b 2.95 D2 3.10 2.95 3.10 E2 A 0.85 0.01 A1 0.00 0.65 A2 A3 0.15 0.20 4.90 5.00 D 4.65 4.75 D1 E 4.90 5.00 4.65 E1 4.75 Ref. GP00-D682-001 GP00-D682-001 Max. 0.75 0.35 3.25 3.25 1.00 0.05 0.80 0.25 5.10 4.85 5.10 4.85 3. APPLIED FOR EXPOSED PAD AND TERMINALS. EXCLUDE EMBEDDING PART OF EXPOSED PAD FROM MEASURING. PD_GP00-D682-001 GP00-D682-001 4-2 Conexant 102025G 102025G NOTES www.conexant.com General Information: U.S. and Canada: (800) 854-8099 International: (949) 483-6996 Headquarters ­ Newport Beach 4311 Jamboree Rd. Newport Beach, CA 92660-3007