User's Manual

Smart Machine Smart Decision

SIM5320A_Hardware Design_V1.01 2011-2-29

Figure 28: Amphenol SIM card socket

Table 19: 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 VPP Connect to USIM_VDD

C7 USIM_DATA SIM Card data I/O.

3.6 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