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The recommended circuits of resetting the module are shown below. An open drain/collector driver or
button can be used to control the RESET pin.
Reset pulse
Figure 11: Reference Circuit of RESET by Using Driving Circuit
The reset scenario is illustrated in the following figure.
VDD_EXT
BC66-NA_Hardware_Design
4.7K
S1
Figure 12: Reference Circuit of RESET by Using Button
VBAT
20ms
RESET
Module
Running
Status
Figure 13: Reset Timing
47K
RESET
TVS
Close to S1
≥50ms
· · · · · · · · · · · ·
Resetting
NB-IoT Module Series
BC66-NA Hardware Design
RESET
Restart
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