User's Manual
Table Of Contents
- Copyright
- Attention
- Trademark
- Versions
- Applicable Model List
- Foreword
- Product Overview
- Structure
- Hardware Introduction
- Hardware Interface
- Electrical and Environmental Characteristic
- RF Interface
L811-EA Module Hardware User Manual Page
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only needs to control the timing of RESET_N and POWER_ON/OFF# signals.
5.2.1.2 Power off
The L811-EA module can be turned off by software or hardware control. Software control is preferred for
normal cases, only when software control is not usable, then use the hardware control. By pulling down or
float the POWER_ON/OFF# signal, the module will be shut down.
①
For details as shown in the following tables:
Control Method
Action
Condition
Software
AT+CPWROFF
Normal control for power off.
Hardware
Pull down or floating the
POWER_ON/OFF#
signal.
Only used when a hardware exception occurs and
the software control cannot be used.
The hardware control description:
By pulling down or float the POWER_ON/OFF# signal, the PMU (Power Management Unit) of the module
will be reset, which results in the state changes from the working state to the shutdown state.
The timing sequence diagram as follows:
Figure 5- 3 Power off Timing Sequence Diagram
Note
①
: To safely shut down the module, the RESET_N signal must be pulled down (for at least 100ms)
before pulling down the POWER_ON/OFF# signal.