Ac97 Controller; Overview; Feature; Signals - Samsung S3C2416 User Manual

S3C2416X RISC MICROPROCESSOR
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1 OVERVIEW

The AC97 Controller Unit of the S3C2416 supports the AC97 revision 2.0 features. AC97 Controller
communicates with AC97 Codec using audio controller link (AC-link). Controller sends the stereo PCM data to
Codec. The external digital-to-analog converter (DAC) in the Codec then converts the audio sample to an analog
audio waveform. Also, Controller receives the stereo PCM data and the mono Mic data from Codec then store in
memories. This chapter describes the programming model for the AC97 Controller Unit. The information in this
chapter requires an understanding of the AC97 revision 2.0 specifications.

1.1 FEATURE

• Independent channels for stereo PCM In(Slot3, Slot4), mono MIC In(Slot 6), stereo PCM Out(Slot3, Slot4).
• DMA-based operation and interrupt based operation.
• All of the channels support only 16-bit samples.
• Variable sampling rate AC97 Codec interface (48kHz and below)
• 16-bit, 16 entry FIFOs per channel
• Only primary Codec support

1.2 SIGNALS

Name
AC_nRESET
AC_BIT_CLK
AC_SYNC
AC_SDO
AC_SDI

AC97 CONTROLLER

Direction
Output Active-low CODEC reset.
Input 12.288MHz bit-rate clock
Output 48 kHz frame indicator and synchronizer
Output Serial audio output data.
Input Serial audio input data.
Description
AC97 CONTROLLER
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