Quectel RG255C-GL Hardware Design page 24

Module
GND
USIM_VDD
USIM_VDD
USIM_RST
USIM_CLK
20K
USIM_DET
USIM_DATA
Figure 5: Reference Circuit of (U)SIM Interface with an 8-pin (U)SIM Card Connector
If (U)SIM card hot-plug detect is not needed, keep USIM_DET unconnected. A reference circuit for
(U)SIM interface with a 6-pin (U)SIM card connector is illustrated in the following figure.
Module
GND
USIM_VDD
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
Figure 6: Reference Circuit of (U)SIM Interface with a 6-pin (U)SIM Card Connector
To enhance the reliability and availability of the (U)SIM card in your applications, please follow the criteria
below in the (U)SIM circuit design:
RG255C-GL_Mini_PCIe_Hardware_Design
USIM_VDD
0R
0R
0R
33 pF 33 pF 33 pF
USIM_VDD
20K
0R
0R
0R
33 pF 33 pF 33 pF
GND
20K
GND GND
(U)SIM Card Connector
GND
5G Module Series
100 nF
(U)SIM Card Connector
VCC GND
RST VPP
IO
CLK
100 nF
VCC GND
RST VPP
CLK IO
GND
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