Automotive Module Series
AG525R-GL QuecOpen
Hardware Design
AG525R-GL_QuecOpen_Hardware_Design 51 / 104
The module supports (U)SIM card hot-plug via the USIM_DET pin and either low level or high level
detection is supported. The function is disabled by default and can be enabled by AT+QSIMDET. See
document [3] for more details of the command.
The following figure shows a reference design for (U)SIM interface with an 8-pin (U)SIM card connector.
Module
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
USIM_DET
22R
22R
22R
VDD_EXT
470K
100 nF (U)SIM Card Connector
GND
GND
VCC
RST
CLK
IO
VPP
GND
USIM_VDD
10K
33 pF 33 pF33 pF
CD1 CD2
Figure 18: Reference Circuit of (U)SIM Interface with an 8-Pin (U)SIM Card Connector
If (U)SIM card detection function is not needed, keep USIM_DET disconnected.
A reference circuit for (U)SIM interface with a 6-pin (U)SIM card connector is illustrated in the following
figure.
Module
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
22R
22R
22R
100 nF
(U)SIM Card Connector
GND
VCC
RST
CLK IO
VPP
GND
10K
USIM_VDD
33 pF 33 pF33 pF
Figure 19: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector
USIM2_DET 258 DI (U)SIM2 card hot-plug detect
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