Quectel EG915U Series, Hardware Design

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LTE Standard Module Series
EG915U_Series_Hardware_Design 16 / 81
2.5. Pin Description
The following tables show the pin definition of the module.
Table 3: I/O Parameters Definition
Table 4: Pin Description
Type Description
AI Analog Input
AO Analog Output
AIO Analog Input/Output
DI Digital Input
DO Digital Output
DIO Digital Input/Output
OD Open Drain
PI Power Input
PO Power Output
Power Supply
Pin Name Pin No. I/O Description DC Characteristics Comment
VBAT_BB 32, 33 PI
Power supply for the
module’s baseband part
Vmax = 4.3 V
Vmin = 3.3 V
Vnom = 3.8 V
It must be
provided with
sufficient current
up to 1 A
VBAT_RF 52, 53 PI
Power supply for the
module’s RF part
It must be
provided with
sufficient current
up to 2.5 A
VDD_EXT 29 PO
Provide 1.8 V for
external circuit
Vnom = 1.8 V
I
O
max = 50 mA
Power supply for
external GPIO’s
pull-up circuits.
Add 2.2 μF
bypass capacitor
when in use.