User's Manual

Smart Machine Smart Decision
SIM7500A_User Manual_V1.022016-09-29
13
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
33,34
PI
Power supply, voltage range: 3.4～
4.2V.
L11_1V8
23
PO
1.8V output with Max. 50Ma
current output for external circuit,
such as level shift circuit.
If unused, keep it
open.
GND
1, 3, 6,
15,16,22
,28,29,3
1,32,35,
43,44,46
,47,53,5
4,56
Ground
System Control
PWRKEY
30
DI,PU
System power on/off control input,
active low.
Default 0.8V
RESET
24
DI, PU
System reset control input, active
low.
RESET has been
pulled up to 1.8V
via a resistor
internally.
USIM interface
USIM_DATA
10
I/O,PU
USIM Card data I/O, which has
been pulled up via a 100KR resistor
to USIM_VDD internally.
All lines of USIM
interface should
be protected
against ESD.
USIM_RST
13
DO
USIM Reset