Wireless 10Base-T Controller

The Cirrus CS22250 wireless 10Base-T controller incorporates the IEEE 802.11b media access controller (MAC) to enable Wi-Fi compliant wireless network devices providing industry-wide interoperability. In addition, the CS22250 supports multimedia and quality of service (QoS) extensions to distribute entertainment content wirelessly throughout the home network with unparalleled performance.

The Cirrus CS22250 wireless 10Base-T Controller provides high-performance, robust, wireless connectivity to common wired home networking technologies such as cable, DSL, Ethernet, and phone line (HPNA) networking. It is a highly integrated, single-chip device containing several high-performance communications processing elements and industry standard system and network connectivity options. The CS22250 delivers an optimal level of flexibility in cost, functionality, and performance for point-to-multi-point home LAN bridging and routing products. It includes an embedded ARM7TDMI processor for executing system control functions, networking protocols, network management, and bridging services.

• Cirrus Whitecap2 protocol support
  • Wi-Fi (802.11b), multimedia, and QoS
• 77 MHz ARM7TDMI RISC processor core
  • 4 KB integrated L1 cache
• Memory controllers
  • 16-bit, 100 MHz SDRAM/FLASH memory interface
  • 4MB addressable memory space
• Forward Error Correction (FEC)
  • Wire-like bit error rate performance
    (10^-11 BER performance for typical 10^-5 BER environment)
• Glueless direct interface to 11 Mbps digital radio
• 7-pin serial Ethernet bridging interface (AUI or TP)
• High-speed parallel bus interface
  • 32-bit multiplexed address/data
  • Two independent DMA channels
• Configuration interface
  • USB 1.1 compliant device
• Package/Technology:
  • 1.8V core, 3.3V I/O; 0.18 micron CMOS process