Quectel EC2 Series User Manual

LTE Module Series
EM05 Hardware Design
EM05_Hardware_Design Confidential / Released 29 / 59
3.8. (U)SIM Interface
The (U)SIM card interface circuitry meets ETSI and IMT-2000 requirements. Both 1.8V and 3.0V (U)SIM
cards are supported.
Table 9: Pin Definition of the (U)SIM Interface
Pin Name
Pin No.
I/O
Description
Comment
USIM_VDD
36
PO
Power supply for (U)SIM card
Either 1.8V or 3.0V is supported
by the module automatically.
USIM_DATA
34
IO
Data signal of (U)SIM card
USIM_CLK
32
DO
Clock signal of (U)SIM card
USIM_RESET
30
DO
Reset signal of (U)SIM card
USIM_DET
66
DI
(U)SIM card insertion
detection. Active high.
Pulled up to 1.8V internally.
When (U)SIM card is present, it is
at high level (pulled up to 1.8V).
When (U)SIM card is absent, it is
at low level.
EM05 supports (U)SIM card hot-plug via the USIM_DET pin, which is a level trigger pin. The USIM_DET
is normally short-circuited to ground when (U)SIM card is not inserted. When the (U)SIM card is inserted,
the USIM_DET will change from low level to high level. The rising edge will indicate insertion of the
(U)SIM card. When the (U)SIM card is pulled out, the SIM_DET will change from high level to low level.
This falling edge will indicate the absence of the (U)SIM card.
Quectel
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Quectel EC2 Series Specifications

General

Brand	Quectel
Model	EC2 Series
Category	Control Unit
Language	English