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CHAPTER 12 INTERRUPT FUNCTIONS
User’s Manual U15104EJ2V0UD
Figure 12-7. Flowchart from Generation of Non-Maskable Interrupt Request to Acknowledgement
WDTM: Watchdog timer mode register
WDT:
Watchdog timer
Figure 12-8. Non-Maskable Interrupt Request Acknowledgement Timing
WDTM4 = 1
(with watchdog timer
mode selected)?
Overflow in WDT?
WDTM3 = 0
(with non-maskable
interrupt request selected)?
Interrupt request generation
WDT interrupt servicing?
Interrupt control
register unaccessed?
Interrupt
servicing start
Interrupt request
held pending
Reset processing
Interval timer
Start
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Instruction
Instruction
CPU processing
WDTIF
PSW and PC save, jump
to interrupt servicing
Interrupt servicing
program
Содержание mPD178053
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