User guide

M80 EVB User Guide
M80_EVB_UGD_V1.2 - 19 -
Module
PCM
interface
Audio codec
PCM
interface
Analog
audio
RJ11
Figure 15: Block diagram of PCM
Figure 16: Pins of PCM interface
Table 6: Pins of PCM channel
Pin
Signal
I/O
Description
Note
1
MICN
I
Negative microphone input
2
SPKN
O
Negative receiver output
3
SPKP
O
Positive receiver output
4
MICP
I
Positive microphone input
The test points of PCM interface have been reserved as below. Customer can measure PCM signal
using these test points.
4
3
2
1
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