W83971D Datasheet, PDF (26/58 Pages) Winbond – AC97 AUDIO CODEC

Preliminary W83971D
7.2 Multiple Codec Example
One primary codec and three secondary codecs, with ID0 and ID1 defining which codec is primary
and the order of the secondary codecs. Note that the ID0 and ID1 are internally pulled up; therefore,
when left floating they configure Codec as Primary. Note: 1 = pull up. 0 = pull down.
DC '97
SYNC
BIT_CLK
SDATA_OUT
RESET#
SDATA_IN0
SDATA_IN1
SDATA_IN2
SDATA_IN3
AC'97 ~ Primary
SYNC
BIT_CLK
SDATA_OUT
ID1
1
RESET#
ID0 1
SDATA_IN
AC'97 ~ Secondary #1
SYNC
BIT_CLK
SDATA_OUT ^{ID1 1}
RESET#
ID0 0
SDATA_IN
AC'97 ~ Secondary #2
SYNC
BIT_CLK
SDATA_OUT
ID1
ID0
0
1
RESET#
SDATA_IN
AC'97 ~ Secondary #3
SYNC
BIT_CLK
SDATA_OUT
RESET#
ID1
ID0
0
0
SDATA_IN
Figure 7.1: Multiple Codec Example
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