Smart Machine Smart Decision
34
EAR1N
47
RESET
35
MIC1N
46
SPI_CS_N
36
MIC1P
45
SPI_MOSI_DATA
37
SPK_P
44
SPI_MISO_DATA
38
SPK_M
43
SPI_CLK
39
GND
42
GND
40
GND
41
GND
2.2
Pin description
Table 4: Pin description
Pin name
I/O
Description
Comment
Power Supply
VBAT
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.
SIM5320J-TE_Hardware Design_V1.01
2012-11-09
14