Quectel QuecOpen AG525R-GL Hardware Design page 52

USIM2_DET 258
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
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
Figure 19: Reference Circuit of (U)SIM Interface with a 6-Pin (U)SIM Card Connector
AG525R-GL_QuecOpen_Hardware_Design
DI (U)SIM2 card hot-plug detect
VDD_EXT USIM_VDD
470K
USIM_VDD
22R
USIM_RST
USIM_CLK
USIM_DET
22R
USIM_DATA
22R
USIM_VDD
10K
USIM_VDD
22R
USIM_RST
USIM_CLK
22R
22R
USIM_DATA
33 pF
AG525R-GL QuecOpen Hardware Design
10K
100 nF
33 pF 33 pF33 pF
GND
100 nF
33 pF 33 pF
GND
Automotive Module Series
(U)SIM Card Connector
VCC GND
RST VPP
IO
CLK
CD1 CD2
GND
(U)SIM Card Connector
VCC GND
RST VPP
CLK IO
51 / 104