Pcm And I2C Interfaces - Quectel EP06 Series Hardware Design

NOTE
S
"*" means under development.

3.6. PCM and I2C Interfaces

The module supports audio communication via Pulse Code Modulation (PCM) digital interface and I2C
interface.
The following table shows the pin definition of PCM and I2C interfaces which can be applied on audio
codec designs.
Table 8: Pin Definition of PCM and I2C Interfaces
Pin No. Pin Name
45 PCM_CLK
47 PCM_DOUT
49 PCM_DIN
51 PCM_SYNC
30 I2C_SCL
32 I2C_SDA
The PCM interface supports the following modes:

Primary mode (short frame synchronization, working as either master or slave)

Auxiliary mode (long frame synchronization, working as master only)
In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising
edge. The PCM_SYNC falling edge represents the MSB. In this mode, the PCM interface supports 256
kHz, 512 kHz, 1024 kHz or 2048 kHz PCM_CLK at 8 kHz PCM_SYNC, and also supports 4096 kHz
PCM_CLK at 16 kHz PCM_SYNC.
EP06_Series_Hardware_Design
Power
I/O
Domain
DI/DO 1.8 V
DO 1.8 V
DI 1.8 V
DI/DO 1.8 V
DO 1.8 V
IO 1.8 V
EP06 Series Hardware Design
Description Comment
PCM clock signal
PCM data output
PCM data input
In master mode, it is an
PCM frame
output signal.
synchronization
In slave mode, it is an input
signal
signal.
I2C serial clock Externally pulled up to 1.8 V.
I2C serial data Externally pulled up to 1.8 V.
LTE-A Module Series
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