User's Manual

SIM7075G User Manual V1.00
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Table 5: Pin description
Pin name
Pin
No.
Default
status
Description
Comment
Power supply
VBAT_BB
32,33
PI
Power supply,
voltage range: 3.3～4.3V. typical: 3.8V
VBAT_RF
52,53
PI
Power supply,
voltage range: 3.3～4.3V. typical: 3.8V
VDD_EXT
29
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
3,31
48,50
54,55
58,54
58,59
61,62
67~74
,79~8
2,89,9
0,91,1
00,10
1,102
Ground
System Control
PWRKEY
15
DI,PU
System power on/off control input,
active low.
The efficient input low level must be
below 0.45V.
The efficient input high level must be
higher than 1.0V.
After the PWRKEY continues to pull
down more than 12.6S, the system will
automatically reset. Therefore,
long-term grounding is not
recommended
The level is 1.5V when
this PIN is floating;
C
max
=10pF
RESET_N
17
Reset the module
SIM interface
SIM_VDD
43
PO
Power output for SIM card, its output
Voltage depends on SIM card type
automatically. Its output current is up
to 50mA.
All lines of SIM interface
should be protected
against ESD.
SIM_DATA
45
I/O,PU
SIM Card data I/O, which has been
pulled up via a 20KR resistor to
SIM_VDD internally. Do not pull it up
or down externally.
SIM_CLK
46
DO
SIM clock
SIM_RST
44
DO
SIM Reset