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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5.2.1.3 The Recommended Design of Power on/off
The recommended design of POWER_ON/ OFF# signal is as follows:
Figure 5- 4 Recommended Design of POWER_ON/OFF# Signal
5.2.2 RESET Signal
The L811-EA module supports the external reset function. By controlling the RESET_N signal, the module
will reset to its initial state. When pulling down the RESET_N signal for 100ms, the module will be reset
and restarted. If the module is already turned on and working before the reset, there is no need to control
POWER_ON/OFF# signal to turn it on. PMU inside the module remains its power during the reset
procedure.
Note:
The reset signal is very sensitive. It should be kept away from RF interference and well wrapped with
ground planes in case of PCB layout. It is recommended to add a filter capacitor close to the module. Also,
RESET_N signal trace shall neither near the PCB edge nor route on the surface planes to avoid module
from reset caused by ESD.
The timing sequence requirement as follows:
Parameter
Condition
Minimum Value
Typical Value
Maximum Value
Unit
Pulse Width
Reset
7
100
1000
ms
L811-EA