User Manual

GSM/GPRS Module Series
GC10 Hardware Design
GC10_Hardware_Design Confidential / Released 48 / 76
please refer to document [1]. When “AT+QSIMDET=1,0” is set and the tray with SIM card is removed
from SIM socket, the following URC will be presented:
+CPIN: NOT INSERTED
When the tray with SIM card is inserted into SIM socket again and the module finishes
reinitializing SIM card, the following URC will be presented:
+CPIN: READY
Call Ready
Figure 32: Reference Circuit for 8-pin SIM Card Holder
1. Please do not use “AT+QSIMDET=1,1” when circuit in Figure 32 is adopted, which can cause to
reinitialize SIM card.
2. When SIM card detection function is used, SIM_PRESENCE pin must be pulled up by an external
resistor. If unused, please keep this pin open.
NOTE