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