User Manual

Smart Machine Smart Decision
SIM7100_Hardware_Design_V1.02 2015-06-16
USIM_DATA 17 I/O,PU
USIM Card data I/O, which has been
pulled up via a 20KR resistor to
USIM_VDD internally. Do not pull
it up or down externally.
All lines of USIM
interface should be
protected against
ESD.
USIM_RST 18 DO USIM Reset
USIM_CLK 19 DO USIM clock
USIM_VDD 20 PO
Power output for USIM card, its
output Voltage depends on USIM
card type automatically. Its output
current is up to 50mA.
SPI interface
SPI_CLK 6
DO
SPI clock output
Only support SPI
master mode.
If unused, please keep
them open.
SPI_MISO 7 DI
SPI master in/slave out data
SPI_MOSI 8 DO
SPI master out/slave in data
SPI_CS 9 DO
SPI chip-select output
USB
USB_VBUS 11 DI,PD
Valid USB detection input with
2.0～5.25V detection voltage
It has been pulled
down to ground via a
10KΩ resistor
internally.
USB_DN 12 I/O
Negative line of the differential,
bi-directional USB signal.
USB_DP
13 I/O
Positive line of the differential,
bi-directional USB signal.
USB_ID 16 DI High-speed USB ID input
Keep it open.
UART interface
RTS 66 DOH Request to send
If unused, keep them
open.
CTS 67 DI,PU Clear to Send
RXD 68 DI,PU Receive Data
RI 69 DOH Ring Indicator
DCD 70 DOH Carrier detects
TXD 71 DOH Transmit Data
DTR 72 DI,PU DTE get ready
I2C interface
SCL 55 DO I2C clock output
If unused, keep open,
or else pull them up
via 4.7KΩ resistors to
1.8V.
SDA 56 I/O I2C data input/output