Quectel LTE-A Series Hardware Design page 47

The (U)SIM scenario is illustrated by the following figure.
USIM_VDD
USIM_DATA
USIM_CLK USIM_CLK
USIM_RST
When AT+QSIMDET=1,0 is set, the scenario of hot-plug is illustrated by the following figure.
USIM_DET
USIM_VDD
USIM_DATA
USIM_CLK
USIM_RST
In order to enhance the reliability and availability of the (U)SIM card in applications, please follow the
criteria below in the (U)SIM circuit design:

Keep the (U)SIM card connector as close as possible to the module. Keep the trace length less than
200mm.
EG18_Hardware_Design
≥1.1ms
≥1.7ms
Figure 20: Timing of (U)SIM
≥103ms
≥1.1ms
≥1.7ms
Figure 21: Timing of Hot-Plug
≥5.8ms
≥20.8ms
≥5.8ms
≥20.8ms
LTE-A Module Series
EG18 Hardware Design
ATR
ATR
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