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