Introduction The Conexant™ CX82100 Home Network Processor (HNP) is a single-chip, 185 MIPS high performance, ARM940T-based processor integrated with multiple network interface hardware functions and packaged into a 196-pin FPBGA. Embedded firmware supports complete networking system solutions in a wide variety of commercial, industrial, business, SOHO, and home applications with appropriate host software. Features • Single-chip, high-performance processor with integrated network interfaces − ARM940T processor − Advanced Microcontroller Bus Architecture (AMBA) with two internal busses ♦ Advanced System Bus (ASB) ♦ Advanced Peripheral Bus (APB) − 16k x 32 internal ROM − 8k x 32 internal RAM − External Memory Controller (EMC) − Two identical 10/100 Mbps IEEE 802.3 Ethernet Media Access Controllers (EMACs) with MII/7-WS interfaces − USB 1.1 Slave Interface − General Purpose Input/Output (GPIO) signals − Timers − Interrupt Controller (INTC) − Clock Generators • ARM940T processor − ARM9TDMI Core − Advanced System Bus (ASB) interface − Advanced Peripheral Bus (APB) interface − Separate 4 kB instruction and 4 kB data caches − Write-back cache scheme and write buffer optimize performance and minimize ASB traffic − Five-stage pipeline with fetch, decode, execute, memory and write stages − ‘TrackingICE’ mode allows a conventional ICE (in-circuit emulator) mode of operation • Dual Media Independent Interface (MII) interface to 10/100 Ethernet PHY • Host Parallel Expansion Bus interface to Flash ROM and other devices • Parallel interface to SDRAM/SRAM • JTAG interface • 22 general purpose I/O lines (13 available for application use, 6 available for application use if optional signals for EEPROM, Host Parallel Expansion Bus, and Clock are not used, and 3 dedicated to system signals) • 196-pin FPBGA
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