CS22250 データシートの表示（PDF） - Cirrus Logic

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CS22250

Wireless 10BT Controller

Cirrus Logic 

2 Features

Embedded ARM Core and System Support Logic

• High Performance ARM7TDMI RISC processor core up to 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.

Enhanced Memory Controller Unit

• Programmable memory controller unit supporting SDRAM /async SRAM/boot ROM/Flash

interface

• 16-bit data bus with 12-bit address supporting up to 4MB and up to 103 MHz (100/133MHz

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

• Flexible independent DMA engines for Ethernet MAC, Digital Radio and External Bus

functional units

FEC codec

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

• Reduces 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. Supports byte-wise single

cycle throughput up to 77MHz, with a sustain rate of 77MBps

• Double buffering (63 Dword read/write buffer) to enhance system performance

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)

Ethernet Interface

• IEEE802.3 Ethernet MAC controller

• Two independent full-duplex DMA channels transfer between Ethernet interface to system

memory

• Standard 7-pin serial interfaces to AUI or Twisted Pair 10-BaseT

• Standard half-duplex CSMA/CD and full-duplex operation

USB Device Configuration Interface

• USB 1.1 compliant

CS22250 Wireless 10BT Controller

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www.cirrus.com

DS551PP2 Rev. 3.0

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