Sierra Wireless HL7748 用户手册
41110555
Rev 1.0
September 21, 2017
41
Product Technical Specification
Design Guidelines
5.6.
USIM1 Application
The AirPrime HL77xx modules support one USIM1 slot.
Figure 14.
Design Application with USIM1 Slot
5.7.
EMC and ESD Guidelines for USIM1 Card
Decoupling capacitors must be added according to the drawing below, as close as possible to the
UIM1 card connectors on UIM1_CLK, UIM1_RESET, UIM1_VCC, UIM1_DATA and UIM1_DET
signals to avoid EMC issues and to comply with the requirements of ETSI and 3GPP standards
covering the USIM1 electrical interface.
UIM1 card connectors on UIM1_CLK, UIM1_RESET, UIM1_VCC, UIM1_DATA and UIM1_DET
signals to avoid EMC issues and to comply with the requirements of ETSI and 3GPP standards
covering the USIM1 electrical interface.
A typical schematic including USIM1 detection is provided below.
Figure 15.
EMC and ESD Components Close to the USIM1.
Sierra Wireless recommends using a ESDALC6V1-5P6 ESD diode for D100.