CS22250 Datasheet, PDF (2/32 Pages) Cirrus Logic – WIRELESS 10BT CONTROLLER

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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DS551PP2 Rev. 3.0