UPD784938 datasheet(75/733 Pages) NEC

Part #	UPD784938

Description	16-Bit Single-Chip Microcontrollers

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75

CHAPTER 3 CPU ARCHITECTURE

Preliminary User’s Manual U13987EJ1V0UM00

3.3.1 Vector table area

The 64-byte area from 00000H to 0003FH is reserved as the vector table area. The vector table area stores the program

start addresses used when a branch is made as the result of RESET input or generation of an interrupt request. When context

switching is used by an interrupt, the number of the register bank to be switched to is stored here.

Any portion not used as the vector table can be used as program memory or data memory.

16-bit values can be written to the vector table. Therefore, branches can only be made within the base area.

Table 3-1. Vector Table

Vector Table Address

Interrupt Source

0003CH

Operand error

0003EH

BRK

00000H

Reset (RESET input)

00002H

NMI

00004H

WDT

00006H

INTP0

00008H

INTP1

0000AH

INTP2

0000CH

INTP3

0000EH

INTC00

00010H

INTC01

00012H

INTC10

00014H

INTC11

00016H

INTC20

00018H

INTC21

0001AH

INTC30

0001CH

INTP4

0001EH

INTP5

00020H

INTAD

00022H

INTSER1

00024H

INTSR1/INTCSI1

00026H

INTST1

00028H

INTCSI

0002AH

INTSER2

0002CH

INTSR2/INTCSI2

0002EH

INTST2

00032H

INTIE1

00034H

INTIE2

00036H

INTW

00038H

INTCSI3

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