HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 365
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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12.1
The SuperH microcomputer has a one-channel watchdog timer (WDT) for monitoring system
operations. If the system becomes uncontrolled and the timer counter overflows without being
rewritten correctly by the CPU, an overflow signal (WDTOVF) is output externally. The WDT
can simultaneously generate an internal reset signal for the entire chip.
When this watchdog function is not needed, the WDT can be used as an interval timer. In the
interval timer operation, an interval timer interrupt is generated at each counter overflow. The
WDT is also used in recovering from standby mode.
12.1.1
WDT features are listed below:
Watchdog timer mode interval timer mode can be selected.
Outputs WDTOVF in or watchdog timer mode. When the counter overflows in watchdog timer
mode, overflow signal WDTOVF is output externally. It is possible to select whether or not to
reset the chip internally when this happens. Either the power-on reset or manual reset signal
can be selected as the internal reset signal.
Generates interrupts in interval timer mode. When the counter overflows, it generates an
interval timer interrupt.
Used to clear standby mode.
Selection of eight counter clock sources
Overview
Features
Section 12 Watchdog Timer (WDT)
Rev. 7.00 Jan 31, 2006 page 339 of 658
Section 12 Watchdog Timer (WDT)
REJ09B0272-0700
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