Quectel LTE-A Module Series Hardware Design page 35

The following figure shows a reference design for a (U)SIM interface with normally closed (U)SIM card
connector.
USIM_VDD
USIM_RST
Module
USIM_CLK
USIM_DET
USIM_DATA
Figure 17: Reference Circuit of Normally Closed (U)SIM1 Card Connector
Normally Closed (U)SIM Card Connector:
⚫
When the (U)SIM is absent, CD is short-circuited to SW and USIM_DET is at low level.
⚫
When the (U)SIM is inserted, CD is open to SW and USIM_DET is at high level.
The following figure shows a reference design for a (U)SIM interface with normally open (U)SIM card
connector.
USIM_VDD
USIM_RST
Module
USIM_CLK
USIM_DET
USIM_DATA
Figure 18: Reference Circuit of Normally Open (U)SIM1 Card Connector
EM120R-GL&EM160R-GL_Hardware_Design
EM120R-GL&EM160R-GL Hardware Design
USIM_VDD
GND
15K
100 nF
(U)SIM Card Connector
22R
22R
22R
33 pF 33 pF 33 pF
GND GND
USIM_VDD
GND
15K
100 nF
(U)SIM Card Connector
22R
22R
22R
33K
33 pF 33 pF 33 pF
GND
GND
LTE-A Module Series
GND
VCC
VPP
RST
IO
CLK
CD SW
GND
1.8 V
4.7K
VCC
GND
RST
VPP
IO
CLK
CD SW
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