Quectel EG915U-EU - Power Supply

LTE Standard Module Series
EG915U-EU_Hardware_Design 30 / 81
Software：
AT+CFUN=<fun> command provides choices of the functionality level through setting <fun> into 0, 1 or
4.
⚫ AT+CFUN=0: Minimum functionality (disable RF function and (U)SIM function).
⚫ AT+CFUN=1: Full functionality (default).
⚫ AT+CFUN=4: Airplane mode (disable RF function).
3.4. Power Supply
3.4.1. Power Supply Pins
EG915U-EU power pins are used to connect an external power, supply power to the RF and BB circuits of
the module.
The following table shows the details of power supply and GND pins.
⚫ Two VBAT_RF pins for RF part.
⚫ Two VBAT_BB pins for BB part.
Table 8: Pin Definition of Power Supply
Pin Name
Pin No.
I/O
Description
Comment
VBAT_BB
32, 33
PI
Power supply for the module’s
baseband part
VBAT_RF
52, 53
PI
Power supply for the module’s
RF part
VDD_EXT
29
PO
Provide 1.8 V for external
circuit
Power supply for
external GPIO’s
pull-up circuits.
Add 2.2 μF bypass
capacitor when in
use.
If unused, keep it
open.