Turn On - Quectel FGM842D Hardware Design

4.2. Turn On

After the module VBAT is powered on, keep the CHIP_EN at high level to realize the automatic startup of
the module.
Table 14: Pin Definition of CHIP_EN
Pin Name Pin No.
CHIP_EN 8
The turn-on timing is shown below:
Module Status
FGM842D_Hardware_Design
Figure 6: Reference Circuit of Power Supply
I/O Description
DI Enable the module
VBAT
CHIP_EN
Figure 7: Turn-on Timing
Wi-Fi&Bluetooth Module Series
Comment
Hardware enable.
Internally pulled up to 3.3 V.
Active high.
˂ 10 ms
> 1 μs
Booting Active
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