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Smart Machine Smart Decision
34
SD_CLK
37
SD_DATA1
35
SD_CMD
36
SD_DATA0
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
MIC_P
MIC_N
I
Differential audio input
HP_MICP
I
Single audio input
If it is unused, connect to
ground through a 100N
capacitor.
EAR_P
EAR_N
O
Positive and negative voice-band
Differential output
HPR
HPL
O
Auxiliary right channel and left
channel voice-band output
SPK_P
SPK_N
O
Loud Speaker Differential 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.
SDIO interface
SD_CLK
O
SDIO clock
SD_CMD
I/O
SDIO command
SD_DATA0
I/O
SDIO data
SD_DATA1
I/O
SDIO data
SD_DATA2
I/O
SDIO data
If it is unused, keep open.
SIM5215&SIM5216_Hardware Design_V2.02
2012-08-31
16
Содержание SIM5215
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