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Automotive Module Series
AG35 Hardware Design
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PCM_CLK
PCM_SYNC
PCM_OUT
MSB
LSB
PCM_IN
125us
MSB
1 2 3231
LSB
Figure 26: Auxiliary Mode Timing
The following table shows the pin definition of PCM and I2C interfaces which can be applied on audio
codec design.
Table 18: Pin Definition of PCM Interface
Pin Name
Pin No.
I/O
Description
Comment
PCM_IN
66
DI
PCM data input
1.8V power domain
PCM_OUT
68
DO
PCM data output
1.8V power domain
PCM_SYNC
65
IO
PCM data frame sync signal
1.8V power domain
PCM_CLK
67
IO
PCM data bit clock
1.8V power domain
MCLK
152
DO
Output 12.288MHZ
1.8V power domain
Table 19: Pin Definition of I2C Interfaces
Pin Name
Pin No.
I/O
Description
Comment
I2C1_SDA
42
IO
I2C1 serial data
Require external pull-up to 1.8V
I2C1_SCL
43
DO
I2C1 serial clock
Require external pull-up to 1.8V
I2C2_SDA
73
IO
I2C2 serial data
Require external pull-up to 1.8V