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Microcomputer Technical Q&A
69
Q&A No.: QAH8S-058
Category: Pins
Subject: WDTOVF Pin
Questions
1. What is the state of the WDTOVF pin in hardware standby mode?
2. The WDTOVF pin is high during the hardware standby period. Please give an example of a
circuit that drives this signal low.
3. What is the WDTOVF pin output specification?
Answers
1. In hardware standby mode, the WDTOVF pin is high.
2. An example of a circuit that drives the WDTOVF signal low during the hardware standby
period is shown below.
Hardware
standby input
Low output
H8S Series chip
STBY
WDTOVF
Sample WDTOVF Signal Low-Level Output Circuit
3. The WDTOVF pin is a CMOS output pin.
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