EM78P257
OTP ROM
VCC
P
D
Q
IRQn
R
/IRQn
CLK
INT
_
Q
IRQm
C
RFRD
L
RF
ENI/DISI
P
IOD
Q
D
R
CLK
_
Q
IOCFWR
C
L
IOCF
/RESET
IOCFRD
RFWR
Fig. 12 Interrupt input circuit
Interrupt
Interrupt sources
ENI/DISI
occurs
ACC
STACKACC
STACKR3
R3
RETI
Fig. 13 Interrupt backup diagram
In EM78P257A/B, each individual interrupt source has its own interrupt vector as depicted in Table 9.
Table 9 Interrupt vector
Interrupt vector
3EC
Interrupt status
Comparator CO4 interrupt
Comparator CO3 interrupt
Comparator CO2 interrupt
Comparator CO1 interrupt
TCCC overflow interrupt
TCCB overflow interrupt
TCCA overflow interrupt
TCC overflow interrupt
External interrupt
3EE
3F0
3F2
3F4
3F6
3F8
3FA
3FC
3FE
Port 5 pin change
This specification is subject to change without prior notice.
41
07.27.2004 (V1.4)
ELAN [ ELAN MICROELECTRONICS CORP ]
