U)Sim Card Connector Without Detection Signal; U)Sim Hot Plug - Fibocom NL668-LA Series Hardware Manual

Figure 5-10 (U)SIM card connector with detection signal reference circuit

5.3.2.2 (U)SIM Card Connector Without Detection Signal

If use (U)SIM card connector without detection signal USIM_ PRESENCE pin must keep floating.
Figure 5-11 (U)SIM card connector without detection signal reference circuit

5.3.3 (U)SIM Hot Plug

NL668-LA series module support (U)SIM hot plug function, it determines the insertion and removal of
(U)SIM card by detect the USIM_ PRESENCE pin state.
The card hot plug function can be configured by the "AT+MSMPD" command, and the AT commands are
shown in the following table:
Table 5-7 (U)SIM card hot plug function configured
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FIBOCOM NL668-LA Series Hardware Guide Page 32 of 61