Quectel EC2 Series User Manual

LTE Module Series
EM05 Hardware Design
EM05_Hardware_Design Confidential / Released 24 / 59
3.5.3. Monitor the Power Supply
AT+CBC command can be used to monitor the VCC voltage value. For more details, please refer to
document [2].
3.6. Turn on and off Scenarios
3.6.1. Turn on the Module Using the FUL_CARD_POWER_OFF#
The following table shows the pin definition of FUL_CARD_POWER_OFF#.
Table 7: Description of FUL_CARD_POWER_OFF# Pin
Pin Name
Pin No.
Description
DC Characteristics
Comment
FUL_CAR
D_POWER
_OFF#
6
A signal control to power on/off
the module. When it is at low
level, the module powers off.
When it is at high level, the
module powers on.
It is pulled to low level
internally.
For 1.8V:
V
IH
max=2.1V
V
IH
min=1.19V
V
IL
max=0.5V
For 3.3V:
V
IH
max=3.6V
V
IH
min=2.0V
V
IL
max=0.8V
Pulled down internally
EM05 can be turned on by driving the FUL_CARD_POWER_OFF# pin to a high level.
It is recommended to use a GPIO from host to control the FUL_CARD_POWER_OFF#. A simple
reference circuit is illustrated in the following figure.
Module
Host
GND
GND
GPIO
FUL_CARD_POWER_OFF#
1.8V or 3.3V
Figure 8: Turn on the Module Using GPIO
The module can also turn on automatically. The FUL_CARD_POWER_OFF# should be pulled up to 1.8V
or 3.3V (recommended) through a resistor, whose resistance should be 5kΩ~10kΩ. In this case, when the
power supply of VCC is cut off, the module will be shut down.
Quectel
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Quectel EC2 Series Specifications

General

Brand	Quectel
Model	EC2 Series
Category	Control Unit
Language	English