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AT76C901

1652AS–VoIP–06/04

Description

The AT76C901 is highly integrated ASIC that can be used as a part of a wireless phone

that utilizes an 802.11 LAN-based wireless medium and carries Voice over IP (VoIP)

Controller) performs most of the PLCP and low MAC functions defined in 802.11. A

DSP, a Codec, and support circuitry perform the encoder function and interfacing to an

external baseband processor for a DSSS system. An interrupt controller and multiple

support peripherals are also included.

Applications

The VoIP baseband device is intended to be used in a wireless phone which operates

by encapsulating voice data within IP frames and transmitting the frames over a conten-

tion-based wireless medium. Specifically, the first application of the device is targeted at

a wireless phone operating on an 802.11 wireless LAN at 2.4 GHz. Figure 1 shows an

example of the device being utilized in a wireless phone.

Assumptions

The AT76C901 device can be used in a wireless phone powered by battery cells. The

device does not incorporate any access point type features, such as antenna diversity or

Ethernet interfaces.