Hardware+Design V1.07

Smart Machine Smart Decision
67 UART_CTS 68 UART_RXD
69 UART_RI 70 UART_DCD
71 UART_TXD 72 UART_DTR
73 PCM_DOUT 74 PCM_DIN
75 PCM_SYNC 76 PCM_CLK
77 GND 78 GND
79 GPS_ANT 80 GND
2.2 Pin description
Table 4: Pin description
Pin name I/O Description Comment
Power Supply
VBAT_ RF/V BAT_ BB 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.
Audio interface
MIC1P
MIC1N
I Differential audio input
If it is unused, connect to
ground through a 100N
capacitor.
EAR1P
EAR1N
O
SPK_P
SPK_N
O
Differential audio output
If these pins are unused，
keep open.
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
If it is unused, keep open.
SIM5320_Hardware Design_V1.07 2012-09-21
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