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Preliminary
AC97 CONTROLLER
S3C2451 RISC MICROPROCESSOR
27-8
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Slot 3: PCM Record Left channel
Slot 3 which is audio input frame is the left channel audio output of the AC97 Codec. If a sample has a resolution
that is less than 16 bits, the AC97 Codec fills all training non-valid bit positions in the slot with zeroes.
Slot 4: PCM Right channel audio
Slot 4 which is audio input frame is the right channel audio output of the AC97 Codec. If a sample has a
resolution that is less than 16 bits, the AC97 Codec fills all training non-valid bit positions in the slot with zeroes.
Slot 6: Microphone Record Data
The AC97 Controller only supports 16-bit resolution for the MIC-in channel.
SDATA_OUT
BIT_CLK
SYNC
AC '97 samples SYNC assertion here
AC '97 Controller samples first SDATA_IN bit of frame here
END of previous Audio Frame
Codec
Ready
Slot(1)
Slot(2)
Slot(12)
"0"
"0"
"0"
19
0
Tag Phase
Data Phase
19
0
START of Data phase
Slot# 1
END of Data Frame
Slot# 12
Figure 27-6. AC-link Input Frame