Product Info

LTE Standard Module Series
EG91 Hardware Design
EG91_Hardware_Design 30 / 93
Switching on the power switch to supply power to USB_VBUS will wake up the module.
Please pay attention to the level match shown in dotted line between the module and the host. Please
refer to
document [1]
for more details about EG91 power management application.
3.5.2. Airplane Mode
When the module enters into airplane mode, the RF function does not work, and all AT commands
correlative with RF function will be inaccessible. This mode can be set via the following ways.
Hardware:
The W_DISABLE# pin is pulled up by default. Driving it to low level will let the module enter into airplane
mode.
Software:
AT+CFUN command provides the choice of the functionality level through setting <fun> into 0, 1 or 4.
 AT+CFUN=0: Minimum functionality mode. Both (U)SIM and RF functions are disabled.
 AT+CFUN=1: Full functionality mode (by default).
 AT+CFUN=4: Airplane mode. RF function is disabled.
1. Airplane mode control via W_DISABLE# is disabled in firmware by default. It can be enabled by
AT+QCFG="airplanecontrol" command and this command is under development.
2. The execution of AT+CFUN command will not affect GNSS function.
3.6. Power Supply
3.6.1. Power Supply Pins
EG91 provides four VBAT pins dedicated to connect with an external power supply. There are two separate
voltage domains for VBAT.
 Two VBAT_RF pins for module’s RF part.
 Two VBAT_BB pins for module’s baseband part.
The following table shows the details of VBAT pins and ground pins.
NOTE
NOTES