User's Manual

Smart Machine Smart Decision
SIM5320_Hardware Design_V1.01 2011-11-10
14
67 UART_CTS 68 UART_RXD
69 UART_RI 70 UART_DCD
71 UART_TXD 72 UART_DTR
73 NC 74 NC
75 NC 76 NC
77 GND 78 GND
79 GPS_ANT 80 GND
2.2 Pin description
Table 3: Pin description
Pin name I/O Description Comment
Power Supply
VB AT_ RF/ VB AT_B B Power supply voltage
VRTC I/O
Power supply for RTC
VREG_AUX O LDO power output
If it is unused, keep open.
GND
Ground
Power on/off
POWER_ON I
POWER_ON should be pulled low at
least 64ms to power on or 500ms to
power off the module.
USIM interface
V_USIM O
Voltage Supply for SIM card
Support 1.8V or 3V SIM card
USIM_DATA I/O SIM Data Output/Input
USIM_CLK O SIM Clock
USIM_RESET O SIM Reset
All signals of SIM
interface should be
protected against
ESD/EMC.
SPI interface
SPI_CLK
O
SPI clock
SPI_CS_N O
SPI chip-select
SPI_MOSI_DATA O
SPI (master only) master out/slave in
data
SPI_MISO_DATA I
SPI (master only) master in/slave out
data
If it is unused, keep open.
USB
USB_VBUS I USB power supply input
They are compliant with