Figure 33: Reference Circuit For Sim1 Interface With 8-Pin Sim Card Holder - Quectel M35 User Manual

The following figure is the reference design for SIM1 interface.
SIM_GND
SIM1_VDD
SIM1_RST
Module
SIM1_CLK
SIM1_PRESENCE
SIM1_DATA

Figure 33: Reference Circuit for SIM1 Interface with 8-pin SIM Card Holder

If SIM1 card detection function is not used, keep SIM1_PRESENCE pin open. The reference circuit for a
6-pin SIM card socket is illustrated as the following figure.
SIM_GND
SIM1_VDD
SIM1_RST
Module
SIM1_CLK
SIM1_PRESENCE
SIM1_DATA
Figure 34: Reference Circuit for SIM1 Interface with the 6-pin SIM Card Holder
M35_User_Manual
VDD_EXT
10K
22R
22R
22R
33pF 33pF33pF
GND
22R
22R
22R
33pF33pF 33pF 33pF
GND
Confidential / Released
GSM/GPRS Module Series
100nF
VCC
RST
CLK
33pF
TVS
GND
100nF
SIM_Holder
VCC
RST
CLK
TVS
GND
M35 User Manual
SIM_Holder
GND
VPP
IO
GND
GND
VPP
IO
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