LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design
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4.3. PCM and I2C Interfaces
*
The module provides one Pulse Code Modulation (PCM) digital interface and one I2C interface for
VoLTE
*
only. The PCM interface supports the following modes:
Table 14: Pin Definition of PCM Interface
Table 15: Pin Definition of I2C Interface
The reference design is illustrated as follows:
Figure 17: Reference Circuit of PCM Interface
Pin Name
Pin No. I/O
Description
Comment
PCM_CLK
4
DO
PCM clock
1.8 V power domain.
If unused, keep this pin open.
PCM_SYNC
5
DO
PCM data frame sync
PCM_DIN
6
DI
PCM data input
PCM_DOUT
7
DO
PCM data output
Pin Name Pin No. I/O
Description
Comment
I2C_SCL
40
OD
I2C serial clock (for external codec) External pull-up resistor is
required.
1.8 V only.
If unused, keep this pin open.
I2C_SDA
41
OD
I2C serial data (for external codec)
