NEC PD750008 Manuale Utente
185
CHAPTER 6 INTERRUPT AND TEST FUNCTIONS
6.2 TYPES OF INTERRUPT SOURCES AND VECTOR TABLES
Table 6-1 lists the types of interrupt sources, and Figure 6-2 shows vector tables.
Table 6-1. Interrupt Sources
Interrupt source signal
In/out
Interrupt
Vectored interrupt request
priority
Note
(vector table address)
INTBT
Reference time interval signal from
In
1
VRQ1 (0002H)
basic interval timer/wactchdog timer
INT4
Detection of both rising and falling
Out
edges
INT0
Rising/falling edge
Out
2
VRQ2 (0004H)
INT1
detection specification
Out
3
VRQ3 (0006H)
INTCSI
Serial data transfer completion signal
In
4
VRQ4 (0008H)
INTT0
Match signal between the count
In
5
VRQ5 (000AH)
register of timer/event counter 0
and modulo register
and modulo register
INTT1
Match signal between the count
In
6
VRQ6 (000CH)
register of timer counter 1
and modulo register
and modulo register
Note The interrupt priority is used to determine the priority when two or more interrupts are
simultaneously generated.
Figure 6-2. Interrupt Vector Table
MBE
RBE
INTBT/INT4 start address
0002H
INTBT/INT4 start address
MBE
RBE
INT0 start address
0004H
INT0 start address
MBE
RBE
INT1 start address
0006H
INT1 start address
MBE
RBE
INTCSI start address
0008H
INTCSI start address
MBE
RBE
INT T0 start address
000AH
INT T0 start address
MBE
RBE
INT T1 start address
000CH
INT T1 start address
Address
0000H
MBE
RBE
Internal reset start address
Internal reset start address
(high-order 6 bits)
(low-order 8 bits)
(high-order 6 bits)
(low-order 8 bits)
(high-order 6 bits)
(low-order 8 bits)
(high-order 6 bits)
(low-order 8 bits)
(high-order 6 bits)
(low-order 8 bits)
(high-order 6 bits)
(low-order 8 bits)
(high-order 6 bits)
(low-order 8 bits)