CS22250 Wireless 10BT Controller

1 of 32

DS551PP2

Rev. 3.0

www.cirrus.com

1

Introduction

The Cirrus Logic CS22250 Wireless Network Controller enables high speed, 11 Mbps digital

wireless data connectivity for wireless Ethernet bridge, access points, and other broadband

applications.

The CS22250 is a highly integrated single-chip Ethernet bridge solution for wireless networks

supporting video, audio, voice, and data traffic. The programmable controller executes Cirrus

Logic’s Whitecap™2 networking protocol that provides Wi-Fi™ (802.11b) compliance, multimedia

and a foundation for quality of service (QoS) applications, and Ethernet to wireless bridging. The

device includes several high performance components including an ARM7TDMI RISC processor

core, a Forward Error Correction (FEC) codec, and a wireless radio MAC supporting up to 11

Mbps throughput. The CS22250 utilizes state of the art 0.18um CMOS process and is housed in

a 208 FPBGA compact package, offering low-lead inductance suitable for highly integrated radio

applications. The core is powered at 1.8 V with 3.3V I/O to reduce overall power consumption. In

addition, the CS22250 supports various power management modes for host, MAC, baseband,

and radio interfaces.

The CS22250 is designed to provide integrated low cost IEEE 802.3 standard compliant system

solutions. The controller also incorporates a high-speed parallel interface, which can be used to

interface with other ASICs (eg: HNPA 2.0 Network controller) to implement a variety of other

wireless LAN bridging products.

Figure 1. Example System Block Diagram

2.4 GHz Direct Sequence

Spread Spectrum

11 Mbps Wireless

Baseband I/F

CS22250

Wireless 10BT

Controller

802.11b compatible

2.4 GHz

Digital Radio

PHY Transceiver

System Memory

SDRAM (Up to 4MB)

SRAM (Up to 256KB)

Boot ROM/Flash

(Upto1MB)

High Speed Parallel Interface

AUI Serial Interface

CS22250 Data Sheet

Wireless 10BT Controller

Configuration Interface (USB)

10 BaseT

Ethernet PHY