NEC PD754244 Manuel D’Utilisation
CHAPTER 7 INTERRUPT AND TEST FUNCTIONS
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User’s Manual U10676EJ3V0UM
7.2 Types of Interrupt Sources and Vector Table
The
µPD754244 has the following six interrupt sources and nesting of interrupts can be controlled by software.
Table 7-1. Types of Interrupt Sources
Interrupt Source
Internal/External
Vectored Interrupt Request Signal
(Vector Table Address)
Interrupt
Priority
Note
INBT
(reference time interval signal from ba-
sic interval timer/watchdog timer)
INT0
(rising edge or falling edge is selected)
INTT0
(signal indicating match between count
register of timer counter 0 and modulo
register)
INTT1
(signal indicating match between count
register of timer counter 1 and modulo
register)
INTT2
(signal indicating match between count
register of timer counter 2 and modulo
register)
INTEE
(signal indicating writing of EEPROM
has ended)
Internal
1
VRQ1 (0002H)
External
2
VRQ2 (0004H)
Internal
3
VRQ5 (000AH)
Internal
4
VRQ6 (000CH)
Internal
Internal
5
VRQ7 (000EH)
Note If two or more interrupts occur at the same time, the interrupts are processed according to this priority.