Quectel LTE Standard Module Series - W_DISABLE# Signal; PERST# Signal

LTE Standard Module Series
EG21-G Mini PCIe Hardware Design
EG21-G_Mini_PCIe_Hardware_Design 28 / 54
3.8.3. W_DISABLE# Signal
EG21-G Mini PCIe provides a W_DISABLE# signal to disable or enable the RF function (excluding
GNSS). The W_DISABLE# pin is pulled up by default. Its control function for airplane mode is disabled by
default, and AT+QCFG=“airplanecontrol”,1 can be used to enable the function. Driving it low can make
the module enter airplane mode.
Table 12: Airplane Mode Controlled by Hardware Method
The RF function can also be enabled or disabled through AT commands AT+CFUN, and the details are
as follows.
Table 13: Airplane Mode Controlled by Software Method
3.8.4. PERST# Signal
The PERST# signal can be used to force a hardware reset on the card. The module can be reset by
driving the PERST# signal low for 150ms~460ms and then releasing it. The PERST# signal is sensitive to
interference. The traces should be as short as possible and be surrounded with ground. The reset
scenario is illustrated in the following figure.
W_DISABLE#
RF Function Status
Module Operation Mode
High level
RF enabled
Normal mode
Low level
RF disabled
Airplane mode
AT+CFUN=?
RF Function Status
Module Operation Mode
0
RF and (U)SIM disabled
Minimum functionality mode
1
RF enabled
Normal mode
4
RF disabled
Airplane mode