UPD784907 Datasheet, PDF (55/98 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784907, 784908
9.2 Vectored Interrupt
When a branch to an interrupt servicing routine occurs, the vector table address corresponding to the interrupt
source is used as the branch address.
Interrupt servicing by the CPU consists of the following operations :
• When branching: Saves the CPU status (PC and PSW contents) to the stack.
• When returning: Restores the CPU status (PC and PSW contents) from the stack.
To return control from the servicing routine to the main routine, the RETI instruction is used.
The branch destination addresses must be within the range of 0 to FFFFH.
Interrupt Source
BRK instruction
Operand error
NMI
WDT
INTP0
INTP1
INTP2
INTP3
INTC00
INTC01
INTC10
INTC11
INTC20
INTC21
INTC30
INTP4
INTP5
INTAD
INTSER
INTSR
INTCSI1
INTST
INTCSI
INTSER2
INTSR2
INTCSI2
INTST2
Table 9-3. Vector Table Address
Vector Table Address
003EH
003CH
0002H
0004H
0006H
0008H
000AH
000CH
000EH
0010H
0012H
0014H
0016H
0018H
001AH
001CH
001EH
0020H
0022H
0024H
Interrupt Source
NTIE1
INTIE2
INTW
INTCSI3
0026H
0028H
002AH
002CH
002EH
Vector Table Address
0032H
0034H
0036H
0038H
Data Sheet U11680EJ2V0DS00
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