Service Guide

LTE Standard Module Series
EG91_Series_Hardware_Design
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EG91 series module supports 16-bit linear data format. The following figures show the primary mode’s
timing relationship with 8 kHz PCM_SYNC and 2048 kHz PCM_CLK, as well as the auxiliary mode’s
timing relationship with 8 kHz PCM_SYNC and 256 kHz PCM_CLK.
P CM _CLK
P CM _S YNC
P CM _DOUT
MS B
LS B
MSB
125 μs
1 2 2 5 625 5
P CM _DIN
MS B
LS BMSB
Figure 22: Primary Mode Timing
P CM _CLK
P CM _S YNC
P CM _DOUT
MS B
LS B
P CM _DIN
125 μs
MS B
1 2 3231
LS B
Figure 23: Auxiliary Mode Timing
The following table shows the pin definition of PCM and I2C interfaces which can be applied on audio
codec design.