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FIBOCOM L610 Series Hardware Guide
Page 37 of 59
Figure 3-9 SIM card slot diagram SIM016-8P-220P
Figure 3-10 Reference design of L610 USIM/SIM interface with detection signal
Principles of SIM card slot with detection signal are as follows:
When SIM is inserted, USIM_PRESENCE pin is high level;
When SIM is not inserted, USIM_PRESENCE pin is low level.