Description

The Cirrus Logic CS22230 Wireless Network Controller enables high speed, 11 Mbps digital wireless connectivity for a variety of platforms including embedded systems, mobile applications, and other cost sensitive applications capable of supporting a standard Mini PCI or USB interface.

Features

Embedded ARM Core and System Support Logic

? High Performance ARM7TDMI RISC processor core at 77MHz

? 4KB integrated, one-way set associative, unified, write through cache

? Individual interrupt for each functional block

? Two 23-bit programmable (periodic or one-shot) general purpose timers

? 8 Dword (32-bits) memory write and read buffers for high system performance

? Abort cycle detection and reporting for debugging

? ARM performance monitoring function for system fine-tuning

? Programmable performance improvement logic based on system configuration

? Flexible independent DMA engines for Mini PCI and Digital Radio functional units

Enhanced Memory Controller Unit

? Programmable memory controller unit supporting SDRAM /async SRAM/boot ROM interface

? 16-bit data bus with 12-bit address supporting up to 4MB at up to 103MHz SDRAM

? 8-bit data bus with addressing support up to 1MB of boot ROM/Flash

? Programmable SDRAM timing and size parameters such as CAS latencies and number of banks columns and rows

FEC codec

? High performance Reed-Solomon coding for error correction (255:239 block coding)

? Reduces symbol error probability of a typical 10e-3 error rate environment to 10e-9

? Programmable rate FEC engine to optimize channel efficiency

? Low latency, fully pipelined hardware encoding and decoding. Support byte wise single cycle throughput up to 77MHz, with a sustain rate of 77MBps.

? Double buffering (64 Dword read/write buffer) to enhance system performance

? On the fly configuration of encoder and decoder

Digital Wireless Radio MAC

? Glue-less interface to 802.11b radio baseband transceiver

? 11Mbps data rate

? 32 Dword transmit/receive FIFO

? Supports clear channel assessment (CCA)

Power Management

? Host (Mini PCI) ACPI compliant

? Remote USB host wakeup

? Supports variable rate radio transmit, receive and standby radio power modes through two DACs

Clock and PLL Interface

? Single 44MHz crystal oscillator reference clock for Mini PCI version. 48MHz reference clock required in USB option.

? Internal PLL to generate internal and on board clocks

USB Controller Interface

? 12 Mbps USB 1.1 compliant device

? Supports 1 to 16 endpoints, endpoints can be bulk, isochronous or interrupt

? Variable endpoint buffer depths providing maximum flexibility for endpoint configurations

? Flexible configuration programming via EEPROM or firmware download

? Remote host wakeup

Mini PCI Controller Interface

? 33MHz 5V/3.3V Mini PCI 2.2 compliant master/target 32-bit data interface

? ARM communication with Mini PCI controller through simple mailbox scheme

? Generic Mini PCI controller programming interface

? Flexible configuration programming via EEPROM

Chip Processing and Packaging

? 208 MQFP package and 0.18 um state-of-the-art CMOS process

? 1.8 V core for low power consumption. 3.3V I/O and 5V tolerant