User's Manual

GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 59 / 95
Figure 30: Reference Circuit for SIM1 Interface with an 8-pin SIM Card Holder
If SIM1 card detection function is not used, keep SIM1_PRESENCE pin open. A reference circuit for a
6-pin SIM card socket is shown in the following figure.
Figure 31: Reference Circuit for SIM1 Interface with a 6-pin SIM Card Holder
The following figure is a reference design for SIM2 interface with a 6-pin SIM card holder.