Tuesday, December 9, 2003
Atmel is making it easier for designers to deliver voice-over-IP (VoIP) connectivity over wireless LAN (WLAN) links with the release of a VoIP processor that houses the 802.11b media access control (MAC) layer.
The AT76C901 includes an ARM7TDMI RISC processor for running VoIP stacks as well as two subsystems. One subsystem includes an ARM7 processor, which is used to execute the 802.11b MAC. The second includes an OakDSPCore and voice codec. In the second subsystem, the Oak core performs voice compression and decompression as defined by ITU standards G.711, G.723.1 and G.729ab.
The VoIP processor works in conjunction with the VxWorks operating system. This OS supports the TCP/IP stack as well as other networking protocols such as TCP, UDP and DHCP.
To speed development, Atmel is releasing a reference design with the AT76C901. In addition to the VoIP processor, the kit includes a baseband IC, transceiver and power amplifier from RF Micro Devices. The reference kit also includes complete schematics, gerber files and software.
The AT76C901 is available now in a 217-pin micro-BGA package. It is priced at approximately $22 in 50,000-unit quantities
By: DocMemory
Copyright © 2023 CST, Inc. All Rights Reserved
|
