EM78P259N/260N

8-Bit Microprocessor with OTP ROM

 

VCC

 

 

 

 

 

 

 

D

P

Q

 

 

 

IRQn

/IRQn

R

 

 

 

CLK

_

 

 

 

INT

 

 

C

Q

 

 

RFRD

IRQm

 

RF

L

 

 

 

 

 

 

 

 

 

 

 

ENI/DISI

 

 

 

 

 

 

 

 

 

 

 

Q

P

D

IOD

 

 

 

 

R

 

 

 

 

_

C CLK

IOCFWR

 

 

 

IOCF

Q

L

 

 

 

 

 

 

 

 

 

/RESET

 

 

 

 

 

 

 

 

 

 

 

IOCFRD

 

 

 

 

 

 

RFWR

 

 

Fig. 6-8 Interrupt Input Circuit

Interrupt sources

 

Interrupt

 

ACC

occurs

STACKACC

ENI/

 

 

 

 

DISI

R3

RETI

STACKR3

 

 

R4

 

 

 

STACKR4

Fig. 6-9 Interrupt Backup Diagram

In EM78P259N/260N, each individual interrupt source has its own interrupt vector as depicted in the table below.

 

Interrupt Vector

 

Interrupt Status

 

 

Priority *

003H

External interrupt

 

 

1

006H

Port 5 pin change

 

 

2

009H

TCC overflow interrupt

 

 

3

00CH

AD conversion complete interrupt

 

 

4

00FH

Comparator interrupt

 

 

5

012H

High-pulse width timer underflow interrupt

 

 

6

015H

Low-pulse width timer underflow interrupt

 

 

7

018H

TCCA overflow interrupt

 

 

8

01BH

TCCB overflow interrupt

 

 

9

01EH

TCCC overflow interrupt

 

 

10

 

*Priority: 1 = highest ;

10 = lowest priority

Product Specification (V1.2) 05.18.2007

• 43

(This specification is subject to change without further notice)

Page 49
Image 49
IBM EM78P259N/260N manual Reti, Interrupt Vector Interrupt Status Priority