Power-On/Off (Power_On_Off) Pin - Huawei ME909 Series Hardware Manual

HUAWEI ME909 Series LTE LGA Module
Hardware Guide
Table 3-3 Definitions of the pins on the signal control interface
Pin
Pin Name
No.
81 POWER_ON_OFF
100 RESIN_N
11 WAKEUP_IN
71 WAKEUP_OUT
15 SLEEP_STATUS
101 LED_MODE

3.4.2 Power-on/off (POWER_ON_OFF) Pin

The ME909 module can be controlled to be powered on/off by the Power_On_Off pin.
Table 3-4 Two states of Power_On_Off
Item. Pin state
1
2
So POWER_ON_OFF pin cannot be fixed to a low state. Pull-up resistor is never
needed for this pin.
Issue V0.3 (2013-05-21)
I/O Description
Pin for controlling power-on and
I
power-off
I Pin for resetting the system
H: Sleep mode is disabled
I
L: Sleep mode is enabled (default
value)
Module to wake up the host.
H: Wake up the host, the module
hold 1s high-level-voltage pulse
O
and then output low-level-voltage.
L: Do not wake up the host
(default value).
Indicates sleep status of ME909
O H: ME909 is in wakeup state.
L: ME909 is in sleep state.
Mode indicator
Current sink
O
Drive strength: 10 mA
Under development.
Low (when ME909 is
in power off state.)
Low (when ME909 is
in power on state.)
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Description
ME909 is powered on.
POWER_ON_OFF pin should be pulled down
for 0.5s to 1.0s.
ME909 is powered off.
POWER_ON_OFF pin should be pulled down
for 3.0s to 5.0s.
DC Characteristics (V)
Min. Typ.
Pulled up
on module
–0.3
1.8
–0.3
1.8
–0.3
1.8
–0.3
1.8
- -
Max.
2.1
2.1
2.1
2.1
-
25