AMD Am79C930 manual

PRELIMINARY

Am79C930

PCnet™-Mobile

Single-Chip Wireless LAN Media Access Controller

DISTINCTIVE CHARACTERISTICS

■Capable of supporting the IEEE 802.11 standard (draft)

■Supports the Xircom Netwave™ media access control (MAC) protocols

■Supports MAC layer functions

■Individual 8-byte transmit and 15-byte receive FIFOs

■Integrated intelligent 80188 processor for MAC layer functions

■Glueless PCMCIA bus interface conforming to PC Card standard—Feb. 1995

■Full PCMCIA software interface support for PC Card standard—Feb. 1995

■Glueless ISA (IEEE P996) bus interface with full support for Plug and Play release 1.0a

■Glueless SRAM interface for MAC operations, supporting up to 128 Kbytes of memory

■Glueless Flash memory interface, supporting up to 128 Kbytes of non-volatile memory for MAC control code, PCMCIA configuration

parameters, and ISA Plug and Play configuration parameters

■Provides integrated Transceiver Attachment Interface (TAI), supporting Frequency-Hopping Spread Spectrum, Direct Sequence Spread Spectrum, and infrared physical-layer interfaces

■Antenna diversity selection support

■Fabricated with submicron CMOS technology with low operating current

■Supports dual 3 V and 5 V supply applications

■Low-power mode allows reduced power consumption for critical battery-powered applications

■144-pin Thin Quad Flat Pack (TQFP) package available for space-critical applications, such as

PCMCIA

■JTAG Boundary Scan (IEEE 1149.1) test access port for board-level production test

GENERAL DESCRIPTION

PCnet-Mobile (Am79C930) is the first in a series of mo- bile networking products in AMD’s PCnet family. The Am79C930 device is the first single-chip wireless LAN media access controller (MAC) supporting the IEEE

802.11(draft) standard and the Xircom Netwave™ MAC protocols. The Am79C930 device is designed to have a flexible protocol engine to allow for industry standard and proprietary protocols. Protocol firmware for Xircom Netwave and IEEE 802.11 (draft) MAC pro- tocols are supplied by AMD. It is pin-compatible with the PCMCIA bus or the ISA (Plug and Play) bus through a pin-strapping option.

The Am79C930 device contains a PCMCIA/ISA bus interface unit (BIU), a MAC control unit, and a

transceiver attachment interface (TAI). The TAI sup- ports frequency-hopping spread spectrum, direct sequence spread spectrum, and infrared physical layer interfaces. In addition, a power down function has been incorporated to provide low standby current for power- sensitive applications.

The Am79C930 device provides users with a media ac- cess controller that has flexibility (i.e., bus interface, protocol, and physical layer support) to allow the design of multiple products using a single device. By having all the necessary MAC functions on a single chip, users only need to add memory and the physical layer in order to deliver a fully functional wireless LAN connection.

Publication# 20183 Rev: B Amendment/0

Issue Date: April 1997

This document contains information on a product under development at Advanced Micro Devices. The	1
information is intended to help you evaluate this product. AMD reserves the right to change or discontinue
work on this proposed product without notice.