User's Manual

Smart Machine Smart Decision
SIM7020G_User Manual_V1.00 13 2019-01-15
36
GND
73
GND
37
GND
2.2 Pin Description
Table 4: IO parameters definition
Pin type
Description
PI
Power input
PO
Power output
AI
Analog input
AIO
Analog input/output
I/O
Bidirectional input /output
DI
Digital input
DO
Digital output
DOH
Digital output with high level
DOL
Digital output with low level
PU
Pull up
PD
Pull down
Table 5: Pin description
Pin name
Pin No.
Default
status
Description
Comment
Power supply
VBAT
34、35
PI
Power supply, voltage range:
2.1-3.6V.
VDD_EXT
40
PO
Power output 1.8V for other
external circuits with Max
50mA current output, such as
level shift circuit. Not present in
PSM mode.
If unused, keep it
floating.
VDD_3V3
9
PO
Power output 3.3V for other
external circuits with Max
50mA current output. Not
present in PSM mode.
Voltage range
3.3V-3.5V( depend on
VBAT). If unused,
keep it floating.
GND
8、13、
19、21、
27、30、
31、33、
36、37、
45、63、
Ground