Wi-Fi&Bluetooth Module Series
FCM561D-P_Hardware_Design
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CHIP_EN
4.7 k
Ω
47 k
Ω
Control
Q1
R2
R1
Figure 8: Reference Circuit of CHIP_EN by Using A Driving Circuit
Another way to control the CHIP_EN is by using a button directly. When pressing the button, an
electrostatic strike may generate from finger. Therefore, a TVS component shall be placed near the
button for ESD protection.
CHIP_EN
S1
Closed to S1
TVS
Figure 9: Reference Circuit of RESET with A Button
The module reset timing is illustrated in the following figure.
V
IL
≤ 0.3 V
V
IH
≥ 2.4 V
VBAT
CHIP_EN
T
≥ 1 ms
Figure 10: Reset Timing
