AC'97

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AC'97

(Audio Codec'97) A specification for audio and modem circuits on a PC motherboard. Introduced in 1996 by Intel, AC'97 provides six channels (5.1) of 20-bit, 48 kHz audio. It supports one audio stream per system and a two-element array microphone.

AC Link
AC'97 comprises a controller connected to analog/digital codecs by a 5-wire TDM interface called "AC Link." The two subsystems separate the digital controller, which is built into the PC chipset, from the analog circuits, which can be in a chip on the motherboard, in an interchangeable riser card or cabled close to the I/O connectors. For international certification (homologation), modem codecs are often placed on riser cards. See HD Audio and riser card.
References in periodicals archive ?
Agere is offering a two-chip solution, predominantly used in notebook PCs, consisting of an AC97 digital interface device named SV92A2, plus a silicon DAA device called CSP1038.
The audio interface features two synchronous serial interface (SSI) controllers for I2S or AC97 audio inputs/outputs.
The EBC-C3 includes 48 lines of parallel I/O, LPT interface, keyboard controller, mouse, real-time clock, AC97 audio and other core logic to make the board PC/AT compatible.
The Realtek ALC650 chip has a six-channel, full duplex AC97 2.
Peripherals supported by the module include 10/100 Ethernet networking, USB (Host, Device and OTG), 921Kbps UART and Bluetooth UART, AC97 Audio controller, memory socket support (PCMCIA, CompactFlash(R), SD/SDIO, MMC, and Memory Stick) and external memory bus and GPIO support.
All dsPIC DSCs integrate Flash program memory and many have specialized codec interface supporting the I2S and AC97 protocols.
The ETX-P3Tx also supports 2X IDE ports with support for ATA 33/66, up to 512 Mbytes SDRAM, 10/100 Mbit Base-T Ethernet, Audio AC97 Code VIA, DVO (optional), LVDS up to SXGA 1,280 X 1,024, keyboard/mouse controllers, real-time clock, and watchdog timer.
Realtek ALC655 AC97 audio CODEC supporting 6-channel audio output
Standard features include 4 USB ports, 1 Fast Ethernet interface (10/100Mbps), 2 RS-232 Serial ports, 1 Parallel port, 1 Floppy port, 1 VGA interface, LVDS LCD/Flat panel interface, 1 AC97 Bus, Auxiliary Power, Keyboard and Mouse connectors and an Ultra DMA IDE controller that supports any type of IDE Flash devices (DiskonModule(R), CompactFlash(R) and Flash Disk).
The PCS-620 uses a low-power, 300 MHz Pentium[R] class processor and supports Dual 10/100 BASE T Ethernet ports, RS-232/422/485 serial ports, a CardBus port for wireless, GPS or other devices, dual USB ports, dual AC97 compatible audio, CRT and flat panel video to 1280x 1024, parallel, floppy, EIDE ports, and ambient temperature sensor.
In a single package it provides all the major interfaces needed for hand-held portable media players including an interface to Sharp's latest generation LCD panels, AC97 audio, CompactFlash, MMC/SD, USB, NAND Flash, and SDRAM support, and sufficient performance to decode compressed video and audio.