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.
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.
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 Trusonic MBOX is based around an ARM RISC System on Chip that includes AC97 codecs, Ethernet Controller and USB interfaces.
1 AC97 audio codecs on the PC motherboard can upgrade their PC audio by following simple point-and-click steps.
Standard peripheral such as serial ports, USB (Host & Peripheral), VGA & AC97 Audio and an expansion header are also included along with easy to use step by step tutorials and a plethora of reference design examples.
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.
The board also includes a x1 PCI Express slot and PCI Express Mini Card slot, 2 PCI slots, LVDS display, (4) SATA interfaces, IDE interface, GPIO header, quad USB connection capability, Gigabit Ethernet, I2C EEPROM, RS232 header and AC97 jacks.
All models integrate a powerful set of onboard peripherals, including 4 USB ports, 1 Fast Ethernet interface (10/100Mbps), 2 serial ports (1RS-232, 1RS-232/422/485), 1 parallel port (EPP/ECP), 1 VGA video interface, 1 AC97 sound interface, auxiliary power, keyboard and mouse connectors, as well as an UltraATA IDE controller that supports IDE solid-state Flash devices (i.