User's Manual

SIM7090G User Manual V1.01
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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
OD
Open Drain
Table 5: Pin description
Pin name
Pin
No.
Default
status
Description
Comment
Power supply
VBAT
19,20
PI
Power supply, voltage range:
2.7V～4.8V.
VDD_EXT
21
PO
LDO power output 1.8V for
other external circuits with
Max 50mA current output.
This power supple only use
for external GPIO pulling up
or level shift circuit.
If unused, keep it open.
GND
22,23,
24,25,
27,28,
30,31,
43,52,
53,54,
55,56,
58,65,
66,73,
74,75,
84,85,
86,88,
89
Ground
System Control
PWRKEY
46
DI,PU
System power on/off control
input, active low.
The efficient input low level
The level is 1.5V when this
PIN is floating;