Power Supply; Power Supply Pins - Quectel EG915U-EU Manual

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
VBAT_BB
VBAT_RF
VDD_EXT
EG915U-EU_Hardware_Design
Pin No. I/O
32, 33 PI
52, 53 PI
29 PO
Description
Power supply for the module's
baseband part
Power supply for the module's
RF part
Provide 1.8 V for external
circuit
LTE Standard Module Series
Comment
Power supply for
external GPIO's
pull-up circuits.
Add 2.2 μF bypass
capacitor when in
use.
If unused, keep it
open.
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