digital infotainment products Single-Chip Cable Modem lC with Dual Software Programmable Network-Processing Engines CX24943 Conexant’s Next Generation Cable Modem Solution Offers a Higher Level of Integration, Increased Performance, and Lower Power Dissipation The InfoSurge™ family of products, supporting broadband cable modem applications, presents the industry with yet another example of Conexant’s ability to exceed the needs of a growing market segment. The CX24943, Conexant’s next generation single-chip cable modem IC, reduces the cost of consumer premise equipment (CPE) by providing a highly integrated, robust and flexible solution. The CX24943 leads the industry in cost-effectiveness through its high level of integration, advanced process technology, extremely small package and low power consumption. It offers a dual software programmable network-processing engine architecture, allowing for real-time-critical packet management processing for superior performance. The software programmability of this architecture accommodates application specific requirements, worldwide standards, and manufacturers’ unique value added features, for maximum flexibility. The CX24943 is software compatible with its predecessor, the CN9414. Distinguishing Features • High level of integration • Dual software programmable network-processing engines • 225 MHz system processor • Less than 500 mW typical power dissipation A multitude of interfaces are integrated into the chip, including an embedded IEEE 802.3 Media Access Controller (MAC) with a Media Independent Interface (MII), a USB 1.1 communications • Support for DOCSIS 1.0/1.1, EuroDOCSIS 1.0/1.1, DVB and Proprietary Standards • Direct IF sampling at 44 and 36 MHz transceiver, and a host interface. The CX24943 supports internal • Integrated A/Ds and D/As and external PC cable modems, home networking gateway • Embedded IEEE 802.3 MAC with MII products, IP (Internet Protocol) telephony products, and digital • 12 Mb USB 1.1 communications transceiver set-top boxes. • Support for home networking standards and VoIP digital infotainment products Single-Chip Cable Modem lC with Dual Software Programmable Network-Processing Engines CX24943 Highly Integrated The CX24943 was developed using leading-edge The CX24943 single-chip cable modem IC process and packaging technologies. This helps drive integrates both downstream and upstream physical down the size of the monolithic IC, package and layer (PHY) technologies as well as dual software power, while allowing clock rates to increase more programmable network-processing engines with than 40% from the previous generation of this on-chip memory for cable MAC and application layer product. The CX24943 dissipates less than 500mW processing. The CX24943 provides a cost-effective, of power, setting a new standard for the industry. single-chip, digital cable communications solution. The IC supports a number of interfaces including: The CX24943, through its high level of integration, an IEEE 802.3 10/100 Ethernet MAC with MII for enables manufacturers to achieve cost targets access to home networking standards such as unparalleled in the industry. The additional HPNA 2.0 and HomePlug; a USB 1.1 transceiver; components required to develop a complete and a host interface to accommodate IP telephony cable modem are minimal as shown in the (VoIP), IEEE 802.11a and IEEE 802.11b wireless CX24943-based Cable Modem block diagram. networking standards. LED Indicators GPIO ADC Cable MII Tuner 10/100 Ethernet PHY RJ-45 Conexant HPNA 2.0 PHY RJ-11 Conexant HomePlug PHY Power line DAC Control CX24943 8 MB SDRAM SDRAM Interface Type B Socket USB Host Interface Conexant Voice DSP 1.2v Power Supply 3.3v 5.0v 2 MB Flash 802.11a/b MAC/PHY CX24943-based Cable Modem block diagram RJ-11 RJ-11 Antenna Increased Performance The CX24943 is the fastest solution in the industry The CX24943 utilizes the proven architecture of its with integrated dual software programmable predecessor, the CN9414, and boosts performance network-processing engines on board. Its unique by increasing the system processor speed to 225 packet management, unified memory architecture, MHz. The CX24943 Single-Chip Cable Modem IC and advanced system buses, maximize performance block diagram shows the major functional blocks by allowing segmentation of real-time-critical of the monolithic IC. DOCSIS/EuroDOCSIS 1.0/1.1 functions from non real-time-critical application processes. The Conexant’s sixth-generation physical-layer CX24943’s processor performance and unique downstream receiver includes a 10-bit A/D that architecture enables DOCSIS/EuroDOCSIS 1.1 and accepts a direct IF signal (at 44 or 36 MHz) and other software applications, including: firewall for a 16/256 QAM demodulator with Annex A and B added security; routing for home networking; forward error correction. The CX24943 also contains or VoIP for low-cost IP telephony. an 11-bit D/A converter, which can accommodate 65 MHz of upstream bandwidth for EuroDOCSIS and DVB applications, and a QPSK/16 QAM burst upstream modulator. Conexant’s proven PHY technology exceeds all DOCSIS™/EuroDOCSIS™ 1.0/1.1 requirements for low BERs in noise-filled environments. Peripheral I/O Memory DMA Interrupt Controllers Application Network Processor A D C Cable PHY Downstream D A C Cable PHY Upstream USB Cable MAC Network Processor Host Interface MII CX24943 Single-Chip Cable Modem IC block diagram features and specifications High Flexibility embedded dual network-processing engine, including Cable modem manufacturers have to devote a significant DOCSIS/EuroDOCSIS 1.0/1.1, DVB and proprietary standards. amount of resources to bring new certifiable solutions to Finally, cable operators can download feature enhancements market. The unique architecture of the CX24943 provides a to field-deployed solutions, minimizing truck rolls and number of advantages for cable modem manufacturers and equipment obsolescence. cable operators alike. The software programmability of the dual network-processing engine allows manufacturers to Complete Solution customize the CX24943 for application specific requirements, To reduce the resources and development time required both at the cable MAC and software applications layer. to bring CX24943-based cable modem solutions to market, This feature allows one base platform to support numerous Conexant provides complete certifiable DOCSlS/EuroDOCSIS products, including IP telephony, home networking and 1.0/1.1 Cable Modem Reference Designs. The Cable Modem set-top box as shown in the CX24943-based Cable Modem Reference Designs include software that is not only compliant block diagram. In addition, the architectural similarities to DOCSIS/EuroDOCSIS 1.0/1.1 and meet the network between the CX24943 and its predecessor, the CN9414, requirements of @Home, but also include the USB drivers allows for maximum reuse of certified code. that meet Microsoft’s Windows Hardware Quality Lab (WHQL) requirements. Additional software enhancements that are The CX24943 provides the option to adapt to a multitude above and beyond standards-based requirements are also of standards by downloading different software into the included in this complete software offering. Product Features Cable PHY Downstream Cable MAC Network Processor Host Interface Miscellaneous Functions • • • • • • Software Programmable – DOCSIS 1.0/1.1 compliant – EuroDOCSIS 1.0/1.1 compliant – DVB compliant – Fixed wireless compliant – Proprietary standards • Master mode – 16-bit data – 8-chip selects • Supports Flash, IP telephony, IEEE 802.11a or IEEE 802.11b • 16/32-bit Slave mode (external host and test) • Watchdog Timer • Four additional timers • Interrupt controller 10-bit A/D Direct IF sampling at 44 and 36 MHz 16/256 QAM Demodulator Programmable equalization Annex A and B FEC Cable PHY Upstream • 11-bit D/A • QPSK/16 QAM burst modulator • Programmable pre-equalization DMA Interrupt Controller • 16 asynchronous channels • Memory to memory moves: aligned/unaligned • Source/destination mode for simple data transfer • Circular/linked buffer support for inbound/outbound data Peripheral I/O • 32 GPIO • JTAG boundary scan • UART ARM940T microcontroller Up to 225 MHz operation 4KB Instruction and 4KB Data Cache Embedded ICE and debug extensions PID, SID, DA/SA, MAC, IP and LLC Filtering • Four 56-bit DES/CRC engines • HCS 16- and 32-bit CRC ingle-cycle engines USB 1.1 • • • • • Integrated 12 Mb transceiver • Communications Peripheral device Reference Designs MII Phase-Locked Loops (4) • IEEE 802.3 MAC layer • Networking technologies – 10/100 Ethernet – Conexant HPNA 2.0 – Conexant HomePlug 1.0 • TDM clock and frame sync generator • Transmit clock generator • Supplied 25MHz Ethernet reference clock • Internal USB clock Application Network Processor • • • • • 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.O. Box C AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, Newport Beach, CA 92660-3095 INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR Order# 101645B 01-0430 Package and Power PURPOSE AND NON-INFRINGEMENT. Conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. Memory • Internal 8 K x 32 SRAM • External SDRAM Interface – 16-bit interface – Supports both 4 MB and 8 MB technologies 228 PBGA All I/O at 3.3V Power supply: 3.3V and 1.2V <500 mW (typical) • DOCSIS 1.0/1.1 • EuroDOCSIS 1.0/1.1 • PCI Product Applications (DOCSIS/EuroDOCSIS 1.0/1.1, DVB, Proprietary) • • • • • • • Cable Modems with Ethernet Cable Modems with USB Cable Modems with IP Telephony PCI Cable Modem Card Internal (CMCI) Cable Modem with Home Networking PCMCIA Cable Modem Digital Set-Top Box with Cable Modem