CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD
- 42 -
3.11 PCM digital voice interface
The CLM920 NC3 module provides a set of PCM audio interfaces supporting 8-bit A
rate,
μ
rate and 16-bit linear short frame encoding format with PCM_SYNC of 8kHZ and
PCM_CLK of 2048kHZ.
Table 3-16 PCM pin definition
Pin Signal name
I/O
Description
Param
eter
Level value (V)
Rem
arks
Min
Typical
Max
24
PCM_IN
DI
PCM data input
VIH
1.2
1.8
2
VIL
-0.3
0.6
25
PCM_OUT
DO PCM data output
VOH
1.35
1.8
2
VOL
0
0.45
26
PCM_SYNC DO
PCM frame sync
signal
VOH
1.35
1.8
2
VOL
0
0.45
27
PCM_CLK
DO PCM clock pulse
VOH
1.35
1.8
2
VOL
0
0.45
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