Quectel EG21-G, Hardware Design

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LTE Module Series
EG21-G Hardware Design
EG21-G_Hardware_Design 18 / 100
3.3.
Pin Description
The following tables show the pin definition of EG21-G modules.
Table 3: I/O Parameters Definition
Type Description
AI Analog input
AO Analog output
DI Digital input
DO Digital output
IO Bidirectional
OD Open drain
PI Power input
PO Power output
Table 4: Pin Description
Power Supply
Pin Name Pin No. I/O Description DC Characteristics Comment
VBAT_BB 59, 60 PI
Power supply for
module’s baseband
part Vmax=4.3V
Vmin=3.3V
Vnorm=3.8V It must be able to
provide sufficient
current up to 0.8A.
VBAT_RF 57, 58 PI
Power supply for
module’s RF part
Vmax=4.3V
Vmin=3.3V
Vnorm=3.8V
It must be able to
provide sufficient
current up to 1.8A in a
burst transmission.
VDD_EXT 7 PO
Provide 1.8V for
external circuit Vnorm=1.8V
I
O
max=50mA
Power supply for
external GPIO’s pull up
circuits.
If unused, keep it open.
GND
8, 9, 19,
22, 36, 46,
48, 50~54,
Ground