CS22250 Wireless 10BT Controller

2 of 32

DS551PP2

Rev. 3.0

www.cirrus.com

2

Features

Embedded ARM Core and System Support Logic

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High Performance ARM7TDMI RISC processor core up to 77MHz

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

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Individual interrupt for each functional block

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

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

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Abort cycle detection and reporting for debugging

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ARM performance monitoring function for system fine-tuning

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Programmable performance improvement logic based on system configuration.

Enhanced Memory Controller Unit

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

interface

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

SDRAM)

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

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Programmable SDRAM timing and size parameters, such as CAS latencies and number of

banks, columns and rows

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

functional units

FEC codec

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

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

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Programmable rate FEC engine to optimize channel efficiency

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Low latency, fully pipelined hardware encoding and decoding. Supports byte-wise single

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

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

Digital Wireless Radio MAC

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Glue-less interface to 802.11b radio baseband transceiver

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11Mbps data rate

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32 Dword transmit/receive FIFO

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Supports clear channel assessment (CCA)

Ethernet Interface

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IEEE802.3 Ethernet MAC controller

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

memory

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

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

USB Device Configuration Interface

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USB 1.1 compliant