Quectel RG520N-AT - PCM for SLIC or Codec; PCM for Bluetooth Audio

5G Module Series
RG520N-AT_Hardware_Design 54 / 109
4.6.1. PCM for SLIC or Codec
The module provides one PCM interface for SLIC or codec, which is multiplexed with I2S interface. Pin
definition of PCM for SLIC or codec is as follows:
Table 18: Pin Definition of PCM Interface for SLIC or Codec
The reference design is illustrated as follows:
PCM_DIN
PCM_DOUT
PCM_SYNC
PCM_CLK
Module
PCM_CLK
PCM_SYNC
PCM_DIN
PCM_DOUT
SLIC
Figure 25: Reference Circuit of SLIC PCM Interface
4.6.2. PCM for Bluetooth Audio*
The module provides one PCM interface only for Bluetooth audio. Pin definition of PCM for Bluetooth
audio is as follows:
Pin Name
Pin No.
Multiplexed
Function
I/O
Description
Comment
I2S_WS
259
PCM_SYNC
DIO
PCM data frame sync
In master mode, it is
an output signal.
In slave mode, it is an
input signal.
I2S_SCK
256
PCM_CLK
DIO
PCM clock
In master mode, it is
an output signal.
In slave mode, it is an
input signal.
I2S_DIN
257
PCM_DIN
DI
PCM data input
I2S_DOUT
255
PCM_DOUT
DO
PCM data output