HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 365
HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6432160.pdf
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This LSI incorporates two watchdog timer channels (WDT_0 and WDT_1). The watchdog timer
can generate an internal reset signal or an internal NMI interrupt signal if a system crash prevents
the CPU from writing to the timer counter, thus allowing it to overflow. Simultaneously, it can
output an overflow signal (5(62) externally.
When this watchdog function is not needed, the WDT can be used as an interval timer. In interval
timer operation, an interval timer interrupt is generated each time the counter overflows. A block
diagram of the WDT_0 and WDT_1 is shown in figure 14.1.
14.1
Watchdog Timer Mode:
Internal Timer Mode:
WDT0102A_010020020700
Selectable from eight (WDT_0) or 16 (WDT_1) counter input clocks.
Switchable between watchdog timer mode and interval timer mode
If the counter overflows, an internal reset or an internal NMI interrupt is generated.
When the LSI is selected to be internally reset at counter overflow, a low level signal is output
from the 5(62 pin if the counter overflows.
If the counter overflows, an internal timer interrupt (WOVI) is generated.
Features
Section 14 Watchdog Timer (WDT)
Rev. 2.0, 08/02, page 325 of 788
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