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SIM5360_Hardware Design_V1.06
2016-11-17
37
Table 17: Amphenol USIM socket pin description
Pin
Signal
Description
C1
USIM_VDD
SIM Card Power supply, it can identify automatically the SIM Card
power mode
,
one is 3.0V±10%, another is 1.8V±10%.
C2
USIM_RST
SIM Card Reset.
C3
USIM_CLK
SIM Card Clock.
C5
GND
Connect to GND.
C6
USIM_VPP
C7
USIM_DATA SIM Card data I/O.
3.8
I2C Interface
I2C is used to communicate with peripheral equipments and can be operated as either a transmitter or
receiver, depending on the device function. Use AT Commands “AT+CRIIC and AT+CWIIC” to read/write
register values of related peripheral equipments connected with I2C interface. Its operation voltage is
1.8V.
3.8.1
Pin Description
Table 18: Pin description
3.8.2
Signal Description
Both SDA and SCL are bidirectional lines, connected to a positive supply via a pull-up resistor
respectively. When the bus is free, both lines are high.
3.8.3
Design Guide
For SIM5360, the data on the I2C bus can be transferred at rates up to 400kbps. The number of peripheral
devices connected to the bus is solely dependent on the bus capacitance limit of 400pF. Note that PCB
traces length and bending are in users’ control to minimize load capacitance.
Note
:
SDA and SCL have none pulled up resistors in module. So there is need to pull them up in users’
application circuit.
Pin name
Pin No.
Function
SDA
56
Serial interface data input and output
SCL
55
Serial interface clock input
SIMCOM
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