User Manual

Smart Machine Smart Decision
SIM7100_Hardware_Design_V1.02 2015-06-16
VDD_EXT 44 PO
LDO power output for SD card
circuit or other external circuit with
Max. 150mA current output. Its
output voltage is Configurable（The
default voltage is 0V）.
If unused, keep it
open.
VDD_1V8 15 PO
1.8V
SMPS
output with
Max. 50mA
current output for external circuit,
such as level shift circuit.
If unused, keep
it
open.
GND
1,2,
5,
10,
14,
37,
40,
41,
43,
57,
58,
60,
61,
64,
65,
77,
78,
80,
81
Ground
System Control
PWRKEY 3 DI,PU
System power on/off control input,
active low.
PWRKEY has been
pulled up to 1.8V via
a 200KΩ resistor
internally.
RESET 4 DI, PU
System reset control input, active
low.
RESET has been
pulled up to 1.8V via
a 40KΩ resistor
internally.
SD interface
SD_CMD 21
DO SDIO command
No need to pull them
up externally. If
unused, keep them
open.
SD_DATA0 22
I/O
SDIO data
SD_DATA1 23
I/O
SD_DATA2 24
I/O
SD_DATA3 25
I/O
SD_CLK 26
DO SDIO clock
USIM interface