EM78P259N/260N
8-Bit Microprocessor with OTP ROM
VCC
P
D
Q
IRQn
R
/IRQn
CLK
INT
_
Q
IRQm
C
L
RFRD
RF
ENI/DISI
P
IOD
Q
D
R
CLK
_
Q
IOCFWR
C
L
IOCF
/RESET
IOCFRD
RFWR
Fig. 6.7 Interrupt Input Circuit
Interrupt
occurs
Interrupt sources
ENI/DISI
ACC
STACKACC
R3
R4
STACKR3
STACKR4
RETI
Fig. 6.8 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
006H
009H
00CH
00FH
012H
015H
018H
01BH
01EH
External interrupt
1
2
Port 5 pin change
TCC overflow interrupt
3
AD conversion complete interrupt
Comparator interrupt
4
5
High-pulse width timer underflow interrupt
Low-pulse width timer underflow interrupt
TCCA overflow interrupt
6
7
8
TCCB overflow interrupt
9
TCCC overflow interrupt
10
*Priority: 1 = highest ; 10 = lowest priority
44 •
Product Specification (V1.0) 06.16.2005
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
