Wireless PCMCIA Controller

The Cirrus CS22220 wireless PCMCIA 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 CS22220 supports multimedia and quality of service (QoS) extensions to distribute entertainment content wirelessly throughout the home network with unparalleled performance.

The Cirrus CS22220 wireless PCMCIA controller enables a high performance, reliable, wireless network interface connection (NIC) for mobile devices, such as PC notebooks and Web pads. The CS22220 delivers an optimal level of flexibility in performance, power management, and cost. It is a highly integrated, low profile single chip device that provides 11 Mbps wireless connectivity. On-chip interfaces include PCMCIA and high speed digital 802.11b wireless radio. The CS22220 also includes an embedded ARM7TDMI processor for executing networking protocols and network management functions. This programmable architecture enables a firmware upgrade path to new features and to track changes in standards specifications.

• Cirrus Whitecap2 protocol support
  • Wi-Fi (802.11b), multimedia, and QoS
• 77 MHz ARM7TDMI RISC processor core
  • 4 KB integrated L1 cache
  • DMA control blocks
• Memory controllers
  • 16-bit, 100 MHz SDRAM/FLASH memory interface
  • 4 MB 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 an11 Mbps digital radio
• Host bus interfaces
  • PCMCIA type II
  • PCMCIA 2.1 compliant/JEIDA 4.2
• Power management
• Package/Technology
  • 1.8V core, 3.0V I/O; 0.18 micron CMOS process