Hardware manual

Microcomputer Technical Q&A

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.