Product Info

LTE Module Series
EG21-G MINIPCIE Hardware Design
EG21-G_MINIPCIE_Hardware_Design 26 / 48
3.8.1. RI Signal
The RI signal can be used to wake up the host. When a URC returns, there will be the following behaviors
on the RI pin after executing AT+QCFG=“risignaltype”,“physical” command.
High
Low
120ms
URC return
Figure 10: RI Behavior
3.8.2. DTR Signal
The DTR signal supports sleep control function. Driving it to low level will wake up the module.
3.8.3. W_DISABLE# Signal
EG21-G MINIPCIE provides a W_DISABLE# signal to disable wireless communications through
hardware operation.
W_DISABLE# signal function is disabled by default, and AT+QCFG=“airplanecontrol”,1 can be used to
enable this function. The W_DISABLE# pin is pulled up by default. Driving it to low level will let the module
enter into airplane mode.
The details of W_DIABLE# signal function is as follows:
Table 11: Airplane Mode Controlled by Hardware Method
Software method can be controlled by AT+CFUN, which has the same effect with W_DISABLE# signal
function, the details is as follows.
W_DISABLE#
RF Function status
Module Operation mode
High Level
RF enabled
Normal mode
Low Level
RF disabled
Airplane mode