5G Module Series
RG255C-GL_Mini_PCIe_Hardware_Design 29 / 57
4.5. Control and Indication Signals
The following table shows the pin definition of control and indication signals.
Table 12: Pin Definition of Control and Indication Signals
1. It is recommended to reserve an RC (R = 0
Ω, C = 33 pF) circuit on the PCM lines, especially for
PCM_CLK.
2. The module can only be used as a master device in applications related to PCM and I2C interfaces
Pin Name
Pin No.
I/O
Description
Comment
RI
17
DO
Ring indication
3.3 V power domain.
DTR
31
DI
Sleep mode control
3.3 V power domain.
W_DISABLE#
20
DI
Airplane mode control
3.3 V power domain.
Pulled up by default;
Active low.
PERST#
22
DI
Fundamental reset
3.3 V power domain.
Pulled up by default;
Active low.
LED_WWAN#
42
OC
LED signal for indicating the network
status of the module
Active low.
WAKE#
1
OC
Wake up the host
NOTE
