Control Signals - Quectel EP06 Manual

PCM_CLK
PCM_SYNC
PCM_DOUT
PCM_DIN
Clock and mode can be configured by AT command, and the default configuration is master mode using
short frame synchronization data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, the
module's firmware has integrated the configuration on some PCM codec's application with I2C interface.
The following figure shows a reference design of PCM interface with an external codec IC.
Module
PCM_CLK
PCM_SYNC
PCM_DOUT
PCM_DIN
Figure 8: Reference Circuit of PCM Application with Audio Codec

3.7. Control Signals

The following table shows the pin definition of control signals.
1 2
MSB
MSB
Figure 7: Timing in Auxiliary Mode
I2C_SCL
I2C_SDA
1.8V
125us
15 16
LSB
LSB
Codec
MIC_BIAS
BCLK
FS
MIC+
MIC-
DACIN
ADCOUT
SPKOUT+
SCLK
SDIN
SPKOUT-
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