LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 33 / 76
The module can be reset by driving RESET_N low for a duration between 2s and 3.8s.
Table 8: Pin Definition of RESET_N
The reset timing is illustrated in the following figure.
VBA T
≥2s
Resetting
Module
Status
Running
RESET_N
V
IL
≤0.45V
Restart
≤3.8s
Figure 9: Timing of Reset Module
The recommended circuit is similar to the PWRKEY control circuit. An open drain/collector driver or button
can be used to control the RESET_N pin.
Reset pulse
RESET_N
4.7K
47K
2s~3.8s
Figure 10: Reference Circuit of RESET_N by Using Driving Circuit
Pin Name Pin No. Description DC Characteristics Comment
RESET_N 45 Reset the module V
IL
max=0.45V Multiplexed from PWRKEY.
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