Quectel EG21-G - Pin Description

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