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LTE-A Module Series
EG18 Hardware Design
EG18_Hardware_Design 46 / 104
The (U)SIM scenario is illustrated by the following figure.
USIM_VDD
≥20.8ms
≥1.1ms
≥1.7ms
USIM_DATA
USIM_CLK
USIM_RST
≥5.8ms
USIM_CLK
ATR
Figure 20: Timing of (U)SIM
When
AT+QSIMDET=1,0
is set, the scenario of hot
-
plug is illustrated by the following figure.
USIM_VDD
≥20.8ms
≥1.1ms
≥1.7ms
USIM_DATA
USIM_CLK
USIM_RST
≥5.8ms
USIM_DET
≥103ms
ATR
Figure 21: Timing of Hot-Plug
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.