![Huawei ME936 Hardware Manual Download Page 23](http://html.mh-extra.com/html/huawei/me936/me936_hardware-manual_167889023.webp)
HUAWEI ME936 LTE M.2 Module
Hardware Guide
Description of the Application Interfaces
Issue 03 (2017-12-11)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
23
Pin
No.
Pin Name
Pad
Type
Description
Parameter
Min.(
V)
Typ.(
V)
Max.(
V)
Comments
H: No TX power backoff
(default).
L: TX power backoff.
V
IL
–0.3
-
0.3
inside.
66
SIM_DET
I
SIM hot swap detection pin.
Rising edge for insertion;
falling edge for removal.
H: SIM is present.
L: SIM is absent.
V
IH
1.26
1.8
2.1
ME936 is
pulled up
inside.
V
IL
–0.3
-
0.63
3.4.2
Power_On_Off Control Pin
The ME936 module can be controlled to be powered on/off by the Power_On_Off pin.
Table 3-4
Two states of Power_On_Off pin
Item Pin state Description
1
High
ME936 is powered on.
NOTE: If ME936 needs to be powered on automatically, the
Power_On_Off pin must be pulled up to 3.3 V.
2
Low
ME936 is powered off.
It is internally pulled to low.
ME936 is powered by regulated 3.3 V
If ME936 is powered by 3.3 V voltage regulator (such as notebook or Ultrabook),
Power_On_Off pin should be pulled up to 3.3 V through a resistor.
The pull-up resistor should be
not larger than 10 k
Ω
.
The following are the power On/Off sequences:
1. The module gets 3.3 V when power supply for the module is switched on.
2. The module is turned on since Power_On_Off pin is pulled up directly to 3.3 V.
3. Host cuts off 3.3 V supply to power off the module.
The recommended circuit is shown as in Figure 3-5 .