Power_On_Off Control Pin - Huawei ME936 Hardware Manual

HUAWEI ME936 LTE M.2 Module
Hardware Guide
Pin
Pin Name
No.
66 SIM_DET

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
1
2
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 kΩ.
The following are the power On/Off sequences:
1.
2.
3.
The recommended circuit is shown as in Figure 3-5 .
Issue 03 (2017-12-11)
Pad
Description
Type
H: No TX power backoff
(default).
L: TX power backoff.
SIM hot swap detection pin.
Rising edge for insertion;
falling edge for removal.
I
H: SIM is present.
L: SIM is absent.
Pin state Description
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.
Low ME936 is powered off.
It is internally pulled to low.
The module gets 3.3 V when power supply for the module is switched on.
The module is turned on since Power_On_Off pin is pulled up directly to 3.3 V.
Host cuts off 3.3 V supply to power off the module.
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Description of the Application Interfaces
Parameter Min.( Typ.(
V) V)
–0.3
V -
IL
V 1.26 1.8
IH
–0.3
V -
IL
Max.( Comments
V)
inside.
0.3
2.1
ME936 is
pulled up
inside.
0.63
23