Smart Module Series
SC206E_Series_Hardware_Design 48 / 115
The module supports (U)SIM card hot-plug via the USIM_DET pins. This function is disabled by default
via software. To enable it, contact Quectel Technical Support to change the software configuration. A
reference circuit for (U)SIM interface with an 8-pin (U)SIM card connector is shown below.
USIM_ VDD
USIM_ RST
USIM_ CLK
USIM_ DATA
USIM_ DET
22R
LDO15A_1V8
100K
100 nF
(U)SIM Card Connector
TVS array
22 pF
VCC
RST
CLK
IO
VPP
GND
USIM_ VDD
10K
Module
R1
R2
C1
22 pF
22 pF
C2
C3
C4
D1
22R
22R
R3
R4
R5
Figure 15: Reference Circuit for (U)SIM Interface with an 8-pin (U)SIM Card Connector
If you do not need hot-plug detection, keep USIM1_DET and USIM2_DET pins open. The following is a
reference circuit for (U)SIM interface with a 6-pin (U)SIM card connector when hot-plug detection is not
needed.
Module
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
22R
22R
22R
100 nF
(U)SIM card connector
TVS array
22 pF
VCC
RST
CLK
IO
VPP
GND
10K
USIM_VDD
22 pF
22 pF
R1
C1
D1
R2
R3
R4
C2
C3
C4
Figure 16: Reference Circuit for (U)SIM Interface with a 6-pin (U)SIM Card Connector
