CX24942 QPSK/16 16/64M ARM940T

p Single-Chip Broadband Wireless Modem CX24942 Conexant Offers a World-Class Broadband Access Platform with Low Cost, High

g p Single-Chip Broadband Wireless Modem CX24942 CX24942 Conexant Offers a World-Class Broadband Access Platform with Low Cost, High Performance, and Flexibility The InfoSurgeTM family of products supporting broadband access applications presents the industry with yet another example of Conexant's ability to meet the growing needs of an emerging market segment. The CX24942 CX24942, Conexant's single-chip broadband wireless modem within the InfoSurge family of products, offers a unique solution supporting worldwide fixed wireless deployment with a multitude of peripheral connections including Ethernet and USB. The CX24942 CX24942 supports internal and external PC broadband wireless modem applications, as well as digital set-top boxes, home networking, and IP telephony products. This unique IC excels in three very important categories when choosing a solution for broadband access applications: cost, performance, and flexibility through field programmability. Distinguishing Features Cost Through unsurpassed levels of integration, a unique architecture, and leading-edge manufacturing techniques, Conexant has · Direct IF sampling at 44 and 36 MHz · Integrated A/Ds and D/As accomplished a level of cost reduction second to none. The · FEC A, B and support single-chip broadband wireless modem IC includes a 10-bit A/D, · Programmable MAC a 10-bit D/A, 64/256 QAM demodulation with Annex A and B · Embedded ARMTM 9 HOST uP forward error correction, QPSK demodulation (Annex B) · Integrated 10/100 Ethernet MAC with MII QPSK/16 QPSK/16 QAM burst transmitter, a programmable MAC, an embedded ARMTM microprocessor, a 10/100 Ethernet MAC, a USB transceiver, and SRAM. In addition, it offers peripheral interfaces to accommodate IP telephony, home networking, and video products. The intelligence built into this IC results in a broadband modem bill of materials (BOM) unmatched in the industry. · 12 MB USB peripheral transceiver · Low-cost support for 16/64M 16/64M SDRAMs g p Single-Chip Broadband Wireless Modem CX24942 CX24942 Performance above 150 MHz with >8 significant bits, resulting Each piece of the CX24942 CX24942 architecture offers its in a back channel that can accommodate 65 MHz own unique contribution to the overall performance of upstream bandwidth. The programmable MAC of the CX24942 CX24942. The cumulative effect of each of is built into an embedded RISC CPU that not only these pieces is unsurpassed performance at the has enough horsepower to do the DOCSIS MAC system level, resulting in a broadband access device functionality, but offers enough performance to the consumer enjoys using. The front end of the IC accommodate emerging applications like contains a fifth-generation physical-layer receiver that IEEE 802.16. The CX24942 CX24942's unique packet accepts a direct IF signal (at 44 or 36 MHz) leading to management, unified memory architecture, and a significant BOM reduction over the competition. advanced system buses enable a high-speed It also contains 10-bit D/A converter operating well Internet access device. CX24942 CX24942 CX24942 CX24942 system diagram What is a Broadband Modem? A broadband modem is a device that allows high-speed data access - from a PC to the Internet - via a fixed wireless, cable TV, DSL, or Satellite network. It is a modem in the true sense of the word - it modulates and demodulates signals - and it delivers Internet data to the desktop at blazing speeds. It simply uses the increased bandwidth of the transmission medium Flexibility through Field Programmability instead of an ordinary phone line. The flexibility of the CX24942 CX24942 product offers four main advantages to the OEM manufacturer. First, the platform provides the option Broadband modems can be part modem, part tuner, to adapt to a multitude of standards by downloading different software onto the embedded RISC engine. Second, the flexibility part encryption/decryption device, part bridge, part enables OEMs to be poised for emerging applications like IP router, part NIC card, part SNMP agent, and part telephony and home networking. Third, the platform contains Ethernet hub. They typically have two connections: RISC engines with excess MIPS, offering OEMs the flexibility to add their own proprietary IP for unique differentiation via software. Finally, the CX24942 CX24942 significantly reduces hardware one to the cable wall outlet and the other to a computer. development time by having software-upgrade capabilities. Online access via broadband modems allows PC users to download information from online services up to 1,000 times faster than today's fastest telephone modems. Here's a quick comparison between a broadband modem and a typical traditional modem. Broadband modem speeds range from 500 Kbps (500,000 bits per second) to 10 Mbps (10 million bits per second). A traditional V.90 56K modem tops out at only 56,000 bits per second. That's a difference of 444,000 bits per second. Hardware companies are presently developing 30 Mbps broadband modems (30,000,000 bits per second) - which are thousands of times faster than ordinary telephone modems. Conexant is working on what's next in broadband CX24942 CX24942 block diagram modem technologies - so home or office PC users will be able to download more information from the Internet in less time. Product Features External Communication Blocks PHY Downstream · Direct IF sampling at 44 and 36 MHz · QSPK; 16/64/256 QAM · FEC A and B and multiple interleaving depths · 10-bit A/D PHY Upstream · QPSK/16 QPSK/16 QAM burst modulator · Programmable equalization · D/As for RF/IF AGC control · 10-bit D/A · On-chip control of RF power amplifier devices Programmable Master or Slave Host Interface · Master mode: (IP telephony, telco return, PCI video solutions) 16-bit data 8-chip selects · 16/32-bit slave mode: external host and test · Write and read strobes or data strobe and R/W · Data transfer handshaking and interrupt support · External interface to Flash External SDRAM Interface · SDRAM technology (120 MHz) · Depths from 2 MB to 8 MB · Support for both 16 Mb and 64 Mb technology Ethernet MAC · MAC sublayer of IEEE 802.3 10/100 Mbps full duplex Half-duplex and loopback operation · Media Independent Interface (MII) · Optional 7 wire serial interface 10 M operation USB · On-chip full-speed transceiver · Device interface to host controller/hub UART · Asynchronous RxD/TxD serial port: 8-bits data, 1 stop bit, no parity Peripheral I/O · 32 GPIO · JTAG boundary scan Crystal Oscillator · Low-jitter oscillator Phase-Locked Loops (4) · Transmit clock generator · ARM reference clock generator · ASB clock generator · Voice frame sync generator Package and Power · 264 BGA · All I/O at 3.3V · Power supply: 3.3V and 1.8V www.conexant.com © 2001, Conexant Systems, Inc. All Rights Reserved. General Information: Conexant and the Conexant logo are trademarks of Conexant Systems, Inc. Other trademarks are U.S. and Canada: (800) 854-8099 owned by their respective owners. Although Conexant International: (949) 483-6996 strives for accuracy in all its publications, this material Headquarters Newport Beach may contain errors or omissions and is subject to change without notice. THIS MATERIAL IS PROVIDED AS IS 4311 Jamboree Rd, P Box C .O. AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, Newport Beach, CA 92660-3095 INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR Order# 101647A 01-0446 PURPOSE AND NON-INFRINGEMENT. Conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. Internal Block Features Embedded ARM Processor · ARM940T ARM940T microcontroller · 5-stage instruction pipeline · Harvard load/store architecture - separate instruction and data buses · Debug extensions and embedded ICE Memory Blocks · Internal 8 K x 32 SRAM · 16-bit interface to external SDRAM: 2 to 8 MB DMA Controller · 13 asynchronous channels · Memory to memory moves: aligned/unaligned · Source/destination mode for simple data transfer · Circular/linked buffer support for inbound/outbound data Internal Bus Architecture · 100 MHz 32-bit advanced system bus (ASB) · 50 MHz 64-bit advanced peripheral bus (APB) · Bridge: ASB master/slave, APB master Cable MAC (Programmable) · DOCSIS 1.0 compliant · DOCSIS 1.1 compliant · DVB for Europe · Filters; PID, DA/SA, SID, Multicast, IP · 56-bit DES engines (3) · HCS 16- and 32-bit CRC single-cycle engines Miscellaneous Functions · 32-bit system timer, four 16-bit timers · IRQ#/FIQ# interrupt controller Product Applications · · · · · · Point-to-multipoint wireless modem Point-to-point wireless modem Cable Modems with Ethernet Cable Modems with USB Cable Modem with HPNA Cable IP Telephony Products