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R01UH0336EJ0102 Rev.1.02
Page 392 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 12 Window Watchdog Timer A (WDTA)
12.3.4
75% Interrupt Output
When the counter reaches 75% of the overflow value, the interrupt request
WDTAnTIT is generated.
The WDTAnMD.WDTAnWIE register enables/disables this function.
The following figure shows the 75% interrupt request generation with the
following conditions:
• Count clock changes after the first trigger
Figure 12-4
Timing Diagram of WDTA 75% Interrupt Output
FFFFH
WDTAnTIT
Counter value
WDTAnTRES
or
WDTAnTNMI
Reset
release
First
trigger
Error
detection
Trigger
75% of
the overflow value
WDTAnMD
write
Overflow value