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F20 Datasheet(PDF) 82 Page - List of Unclassifed Manufacturers

Part # F20
Description  8-ch normal DMA controllers and 8-ch dedicated DMA controllers
PDF  111 Pages
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Boxchip F20 Datasheet
Boxchip. All rights reserved.
Ver 1.01
Page 82
23.
AC97 Interface
23.1.
AC97 Interface Overview
The AC97 interface supports AC97 revision 2.3 features. AC97 controller communicates with
AC97 Codec using an audio controller link (AC-link). Controller sends the stereo PCM data to
Codec. The external digital-to-analog converter (DAC) in the Codec converts the audio
sample to an analog audio waveform. Controller receives the stereo PCM data and the mono
Microphone data from Codec then stores in memories.
AC97 Interface includes below features:
Compliant with AC97 2.3 component Specification
Full-duplex synchronous serial interface
Support 2 channels, TX (stereo),RX (PCM stereo, MIC mono optional)
Variable Sampling Rate AC97 Codec Interface support, up to 48KHz
Support 2 channel and 6 channel audio data output
DRA mode support
Only one primary Codec support
Channels support mono or stereo samples of 16(standard), 18(optional) and
20(optional) bit wide.
One 96×20bits FIFO and one 32×20-bits FIFO for data transfer
Programmable FIFO thresholds
Interrupt and DMA support
23.2.
AC97 Signal Description
Table 23-1. AC97 Controller Signal Description
Signal
Name
Description
Type
Pin
Name
Ball#
AC97_MCLK
AC97 Codec Input Mclk
O
PB5
C2
AC97_BCLK
Digital Audio Serial Clock Provided by AC97 Codec
I
PB6
C1
AC97_SYNC
Digital Audio Sample rate/sync
O
PB7
D2
AC97_DO
Digital Audio Serial Data Input
I
PB8
D1
AC97_DI
Digital Audio Serial Data Onput
O
PB12
E3



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