User's Manual
Wi-Fi&Bluetooth Module Series
FC41D_Hardware_Design
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3.5. Reset the module
Drive CEN low for at least 100 ms and then release to reset the module.
Table 6: Definition of Power Supply and GND Pins
The reference designs for resetting the module are shown below. An open drain/collector driving circuit
or a button can be used to control the CEN pin.
CEN
4.7 k
Ω
47 k
Ω
Control
Q1
R2
R1
Figure 3: Reference Circuit of CEN by Using Driving Circuit
Another way to control the CEN is directly through a button switch. A TVS should be placed near the
button for ESD protection. The reference circuit is as follows:
CEN
S1
Close to S1
TVS
Figure 4: Reference Circuit of CEN by Using Button
Pin Name
Pin No.
Description
Comment
CEN
9
Reset the module
Pulled up to 3.3 V internally
(≥ 100 ms).