Turn On Automatically With Cbl_Pwr_N - Quectel SG865W Series Hardware Design

3.2.2. Turn On Automatically with CBL_PWR_N

Table 9: Pin Definition of CBL_PWR_N
Pin Name
CBL_PWR_N
The module can be turned on automatically by driving CBL_PWR_N pin to GND via a 1 kΩ resistor.
CBL_PWR_N pin is pulled up internally. A simple reference circuit is illustrated in the following figure.
NOTE
If the module turns on automatically through CBL_PWR_N pin, it cannot be turned off manually. In such
case, it can be turned off only by cutting off the power supply of system.
SG865W_Series_Hardware_Design
S1
TVS
Close to S1
Figure 8: Turn On the Module Using a Button
Pin No. I/O
467 DI
CBL_PWR_N
Figure 9: Reference Circuit of Automatic Turn-on
R1
1K
Turn-on pulse
Description
Initiates power-on when grounded
1K
Module
Smart Module Series
PWRKEY
M odul e
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