Huawei ME909s Series - USIM_DET Pin

HUAWEI ME909s Series LTE Mini PCIe Module
Hardware Guide
Description of the Application Interfaces
Issue 02 (2016-09-07)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
26
Pin
No.
Pin
Name
Pad
Type
Description
Parameter
Min.(V)
Typ.(V)
Max.(V)
Comment
12
USIM_
CLK
O
USIM card
clock
V
OH
0.7 x
USIM_P
WR
-
3.3
USIM_PWR
=1.8 V or 3.0
V
V
OL
0
-
0.2 x
USIM_P
WR
10
USIM_
DATA
I/O
USIM card
data
V
IH
0.65 x
USIM_P
WR
-
3.3
USIM_PWR
=1.8 V or 3.0
V
V
IL
0
-
0.25 x
USIM_P
WR
V
OH
0.7 x
USIM_P
WR
-
3.3
V
OL
0
-
0.2 x
USIM_P
WR
8
USIM_
PWR
PO
Power
supply for
USIM card.
-
1.75
1.8
1.98
USIM_PWR
=1.8 V
-
2.75
2.85
3.3
USIM_PWR
=3.0 V
44
USIM_
DET
I
USIM hot
swap
detection
pin.
When it is
High, USIM
is present.
When it is
Low, USIM
is absent.
V
IH
1.62
1.8
1.98
The module
is pulled up
inside. Keep
USIM_DET
floating, if it
is not used.
V
IL
0
-
0.18
3.7.2 USIM_DET Pin
ME909s Mini PCIe module supports USIM hot swap function.
ME909s Mini PCIe module provides an input pin (USIM_DET) to detect whether the
USIM card is present or not. This pin is a level trigger pin, and it is internally pulled up.
If customers do not use the USIM hot swap function, keep USIM_DET floating.