Wi-Fi&Bluetooth Module Series
FCM561D-P_Hardware_Design
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4.2. Turn On
After the module VBAT is powered on, keep the CHIP_EN pin at high level to realize the automatic startup
of the module.
Table 24: Pin Definition of CHIP_EN
The turn-on timing is shown below:
VBAT
CHIP_EN
> 1
μ
s
Module Status
Booting
Active
˂ 10 ms
Figure 7: Turn-on Timing
4.3. Reset
When the voltage of CHIP_EN drops below 0.3 V or pull it down for at least 1 ms, the module can be
reset. The reference design for hardware resetting of the module are shown below. An open collector
driving circuit can be used to control the CHIP_EN pin.
Pin Name
Pin No.
I/O
Description
Comment
CHIP_EN
4
DI
Enable the module
Hardware enable.
Internally pulled up to 3.3 V.
Active high.