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6. Reset Circuit
Figure 6.1 shows the reset circuit and its waveform. In this product, reset is cleared in about 100 ms
from the instant Vcc passes about 2.1 V after having started from 0 V. When Vcc drops down to about
2.1 V, reset turns effective.
Detected power voltage (V)
About 1.25 x (R3 + R4) / R4
Figure 6.1 Reset circuit and its waveform
By using the switch SW4, the MCU can be reset manually.
Table 6.1 Function of SW4 (reset switch)
No.
SW4
Name
RESET
Function
This is the reset switch. Press down this switch to reset the MCU.