HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 250

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HD6475328-CP10

Manufacturer Part Number
HD6475328-CP10
Description
original Hitachi CMOS microcomputer unit (MCU)
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
Section 13 Watchdog Timer
13.1 Overview
The H8/532 has an on-chip watchdog timer (WDT) module. This module can monitor system
operation by requesting a nonmaskable interrupt if a system crash allows the timer count to
overflow.
When this watchdog function is not needed, the WDT module can be used as an interval timer. In
the interval timer mode, an IRQ
interrupt is requested at each counter overflow.
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The WDT module is also used in recovering from the software standby mode.
13.1.1 Features
The basic features of the watchdog timer module are summarized as follows:
• Selection of eight clock sources
• Selection of two modes: watchdog timer mode and interval timer mode
• Counter overflow generates an interrupt request
NMI request in the watchdog timer mode; IRQ
request in the interval timer mode.
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