EM78P258N
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 EM78P258N, each individual interrupt source has its own interrupt vector as
depicted in the table below.
Interrupt Vector
Interrupt Status
Priority*
003H
006H
009H
00CH
012H
015H
018H
01BH
01EH
External interrupt
1
2
3
4
5
6
7
8
9
Port 5 pin change
TCC overflow interrupt
AD conversion complete interrupt
High-pulse width timer underflow interrupt
Low-pulse width timer underflow interrupt
TCCA overflow interrupt
TCCB overflow interrupt
TCCC overflow interrupt
*Priority: 1 = highest ; 9 = lowest priority
Product Specification (V1.0) 06.16.2005
• 41
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
