Product Info

LPWA Module Series
BG95 Series Hardware Design
BG95_Series_Hardware_Design 53 / 106
Table 17: Pin Definition of PCM and I2C Interfaces
The following figure shows a reference design of PCM and I2C interfaces with an external codec IC.
Figure 20: Reference Circuit of PCM Application with Audio Codec
1. “*” means under development.
2. PCM and I2C interfaces support VoLTE or GSM CS voice only.
3.13. Network Status Indication
BG95 provides one network status indication pin: NET_STATUS. The pin is used to drive a network
status indication LED. The following tables describe the pin definition and logic level changes of
NET_STATUS in different network activity status.
Pin Name Pin No. I/O Description Comment
PCM_CLK 4 DO
PCM clock 1.8 V power domain.
PCM_SYNC 5 DO PCM data frame sync 1.8 V power domain.
PCM_DIN 6 DI PCM data input 1.8 V power domain.
PCM_DOUT 7 DO PCM data output
1.8 V power domain.
I2C_SCL 40 OD
I2C serial clock (for external
codec)
Require external pull-up to 1.8 V.
I2C_SDA 41 OD
I2C serial data (for external
codec)
Require external pull-up to 1.8 V.
NOTES