ICE1230 IC Ensemble, ICE1230 Datasheet - Page 23

• Manufacturer Part Number: ICE1230
• Description: ac 97 Audio Codec
• Manufacturer: IC Ensemble

Preliminary
Multiple Codec Extension
One primary and a maximum of three secondary codecs may be supported as an option.
Note:
Multiple Codec Example
One primary codec and three secondary codecs, with tag bits ID[1:0] defining which codec is primary and the
order of the secondary codecs. Note that the ID[1:0] pins are internally pulled down; therefore, an external
4.7k pull-up resistor is necessary to pull the ID[1:0] pins high.
Rev. 1.3, 9/21/98
Table 16. Multiple Codec Mode Select
ID1
0
0
1
1
BIT_CLK is an output for the primary codec and an input pin for the controller and secondary codecs.
ID[1:0] pins with internal pull-down resistors select codec modes, default case = primary codec
Digital Controller supports four DATA_IN pins to support one primary and three secondary codecs.
ID0
0
1
0
1
SDATA_OUT
SDATA_IN0
SDATA_IN1
SDATA_IN2
SDATA_IN3
DC ‘97
BIT_CLK
RESET#
SYNC
Figure 11. Multiple Codec Example
Secondary Codec 1
Secondary Codec 2
Secondary Codec 3
Codec Mode
Primary Codec
AC ‘97 ~ Primary
AC ‘97 ~ Secondary #1
AC ‘97 ~ Secondary #2
AC ‘97 ~ Secondary #3
SYNC
BIT_CLK
SDATA_OUT
RESET#
SDATA_IN
SYNC
BIT_CLK
SDATA_OUT
RESET#
SDATA_IN
SYNC
BIT_CLK
SDATA_OUT
RESET#
SDATA_IN
SYNC
BIT_CLK
SDATA_OUT
RESET#
SDATA_IN
ID1
ID0
ID1
ID0
ID1
ID0
ID1
ID0
0
0
0
1
1
0
1
1
.
ICE 1230
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