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Table 16: Pin Definition of PCM Interfaces
Pin Name
Pin No.
PCM_CLK
3
PCM_SYNC
35
PCM_IN
2
PCM_OUT
34
The following figure shows the external codec reference design.
Figure 17: Reference Circuit of PCM Application with Audio Codec
3.7 I2C Interface
SIM7090G provides an I2C interface with clock rate up to 400 kbps. Its operation voltage is 1.8V.
The following figure shows the I2C bus reference design.
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I/O
Description
DO
PCM clock output
PCM
frame
DO
output
DI
PCM data input
DO
PCM data output
SIM7090G User Manual V1.01
Comment
1.8V power domain
synchronization
1.8V power domain
1.8V power domain
1.8V power domain
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