Huawei ME936 Hardware Manual page 27

HUAWEI ME936 LTE M.2 Module
Hardware Guide
Figure 3-11 Recommended warn boot timing in the notebook/tablet
3.3V (battery,
always on)
RESET#
Power_On_Off
If there is a limitation on the controlling GPIO to be programmable 500 ms, the
following hardware solution can be used, as shown in Figure 3-12 .
Figure 3-12 Power on/off circuit (hardware solution)
ME936
VCC
When
GPIO2 of host.
When
then the module is powered off.
Issue 03 (2017-12-11)
.
t2 ≥ 500 ms
Power_On_Off
Pin6
NMOS
Q1
is the power domain of the GPIO2.
GPIO2
is ON, Q2 is on and Q1 is off. So the Pin6 is controlled by
VCC
GPIO2
VCC is Off, Q2 is off and Q1 is on. So the Pin6 is pulled low,
GPIO2
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Description of the Application Interfaces
t2
Warn boot in the notebook/tablet
3.3V (battery)
1MΩ
NMOS
0Ω
Q2
HOST
GPIO2
VCC
GPIO2
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