
NOVA-945GSE 5.25” SBC
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Figure 2-8: Audio Codec and Connectors
Some of the features of the RealTek ALC655 are listed below:
Meets performance requirements for audio on PC99/2001 systems
Meets Microsoft WHQL/WLP 2.0 audio requirements
16-bit Stereo full-duplex CODEC with 48KHz sampling rate
Compliant with AC'97 Rev 2.3 specifications
o Front-Out, Surround-Out, MIC-In and LINE-In Jack Sensing
o 14.318MHz -> 24.576MHz PLL to eliminate crystal
o 12.288MHz BITCLK input
o Integrated PCBEEP generator to save buzzer
o Interrupt capability
Three analog line-level stereo inputs with 5-bit volume control, LINE_IN, CD,
AUX
High-quality differential CD input
Two analog line-level mono inputs: PCBEEP, PHONE-IN
Two software selectable MIC inputs
Dedicated Front-MIC input for front panel applications (software selectable)
Boost preamplifier for MIC input
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