User's Manual

Smart Machine Smart Decision
SIM5320_Hardware Design_V1.01 2011-11-10
15
USB_DP I/O
Plus (+) line of the differential,
bi-directional USB signal to/from the
p
eri
p
heral device.
USB_DM I/O
Minus (-) line of the differential,
bi-directional USB signal to/from the
p
eri
p
heral device.
Serial interface
UART_RXD I Receive Data
UART_TXD O Transmit Data
UART_RTS O Request to send
UART_CTS I Clear to Send
UART_RI O Ring Indicator
UART_DTR I/O DTE get ready
UART_DCD O Carrier detects
UART_RXD has been
pulled down with a 12kR
resistor to ground in the
module.
If it is unused, keep open.
I2C interface
I2C_SDA I/O I2C data
I2C_SCL O I2C clock output
Pulled up with a 2.2kR
resistor to 2.6V internally.
If it is unused, keep open.
GPIOs
GPIO6
I/O
General input/output PIN.
GPIO7
I/O General input/output PIN.
GPIO8
I/O General input/output PIN.
GPIO9
I/O General input/output PIN.
GPIO10
I/O General input/output PIN.
GPIO11
I/O
General input/output PIN.
GPIO12
I/O General input/output PIN.
GPIO13
I/O General input/output PIN.
GPIO14
I/O General input/output PIN.
GPIO15
I/O General input/output PIN.
All GPIOs.are 1.8V.
If it is unused, keep open.
GPIO1 O
Output PIN as LED control for
network status.
GPIO4 I Input PIN as RF operating control.
GPIO40 O
Output PIN as operating status
indicating of module.
GPIO41 I/O
General input/output PIN. It can be
used as wake/interrupt signal to host
from module
GPIO43 I/O
General input/output PIN. It can be
used as wake/interrupt signal to
module from host.
GPIO44 I/O General input/output PIN.
GPIO42 I/O General input/output PIN.
If it is unused, keep open.
Other interface
RESET I System reset in, active low.