User's Manual

Smart Machine Smart Decision

SIM7600SA-H_User Manual_V1.00 2017-10-11

Module

TVS

USIM_VDD

USIM_CLK

USIM_DATA

USIM_RST

VCC GND

RST VPP

CLK I/O

22Ω

100nF

C707 10M006 512

USIM Socket

22Ω

22pF_NM

Figure 19: USIM interface reference circuit

Note: USIM_DATA has been pulled up with a 100KΩ resistor to USIM_VDD in module. A

100nF capacitor on USIM_VDD is used to reduce interference. For more details of AT

commands about USIM, please refer to document [1].USIM_CLK is very important signal, the

rise time and fall time of USIM_CLK should be less than 40ns, otherwise the USIM card might

not be initialized correctly.