CLM920_NC3_LTE Module Hardware User Guide
Shang Hai YUGE Information Technology co., LTD
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command to set the headphone output; the AT+COUTGAIN command to adjust the handle output
volume gain, the AT+CMICGAIN command to set the microphone gain, and the detailed setting
information reference to the corresponding AT manual.
3.11.2 PCM digital voice interface
The CLM920_NC5 Mini PCIE module provides a set of PCM audio interfaces supporting 8-bit A-rate,
U-rate and 16-bit linear short frame encoding formats with PCM_SYNC of 8kHZ and PCM_CLK of 2048kHZ.
Table 3-16 PCM pin definition
Pin number
Signal name
I/O
description
45
PCM_CLK
D0
PCM clock pulse
47
PCM_DOUT
D0
PCM data output
49
PCM_DIN
DI
PCM data input
51
PCM_SYNC
DO
PCM frame sync signal
Table 3-17 PCM specific parameters
Characteristic
Description
Encoding format
Linear
Data bit
16bits
Master-slave mode
Master/slave mode
PCM clock
2048kHz
PCM frame synchronization
Short frame
Data Format
MSB
Figure 3-23 PCM short frame mode timing diagram