IEI Integration IEM-9452 - Manual (Page 30)

IEM-9452 ETX Module
Page 14
2.6.2 Intel
®
ICH7-M Audio Codec ’97 Controller
The IEM-9452 has an integrated Realtek ALC655 codec. The ALC655 codec is a 16-bit,
full-duplex AC'97 Rev. 2.3 compatible six-channel audio codec designed for PC
multimedia systems, including host/soft audio and AMR/CNR-based designs. The codec
is shown in Figure 2-4.
Figure 2-4:Realtek ALC655 Codec
Some of the features of the codec are listed below.
Meets performance requirements for audio on PC99/2001 systems
16-bit Stereo full-duplex CODEC with 48KHz sampling rate
Compliant with AC'97 Rev 2.3 specifications
Front-Out, Surround-Out, MIC-In and LINE-In Jack Sensing
14.318MHz -> 24.576MHz PLL to eliminate crystal
12.288MHz BITCLK input
Integrated PCBEEP generator to save buzzer
Interrupt capability
Three analog line-level stereo inputs with 5-bit volume control, LINE_IN, CD,
AUX
Power support: Digital: 3.3V; Analog: 3.3V/5V
Standard 48-pin LQFP package