IEI Technology WAFER-LX3, User Manual

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WAFER-LX3 3.5” Motherboard
Page 23
2.4.2 AMD
®
Geode™ CS5536 Audio Codec 97 (AC’97) Controller
The AC’97 specification v2.3 compliant controller on the chipset is interfaced to a 20-bit
DAC and 18-bit ADC full-duplex AC'97 2.3 stereo RealTek ALC203 codec. The ALC203 is
then connected to a 10-pin audio connector to which an audio kit can easily be connected.
The codec meets performance requirements for audio on PC99/2001 systems. The audio
connector and codec are shown in Figure 2-9 below.
Figure 2-9: Audio Connector and Codec
Some of the codec features are listed below.
20-bit DAC and 18-bit ADC resolution
18-bit Stereo full-duplex CODEC with independent and variable sampling rate
Complies with AC'97 2.3 specifications
o
LINE/HP-OUT, MIC-IN and LINE-IN sensing
o
14.318MHz -> 24.576MHz PLL saves crystal
o
12.288MHz BITCLK input can be consumed
o
Integrated PCBEEP generator to save buzzer
o
Interrupt capability
o
Page registers and Analog Plug & Play
Three analog line-level stereo inputs with 5-bit volume control: LINE_IN, CD,