MC68HC11E0CFNE3 Datasheet, PDF (93/242 Pages) Freescale Semiconductor, Inc – M68HC11E Family

BEGIN
X BIT
YES
IN CCR
SET ?
NO
HIGHEST
PRIORITY
YES
INTERRUPT
?
NO
YES
IRQ ?
NO
XIRQ PIN
YES
SET X BIT IN CCR
LOW ?
FETCH VECTOR
$FFF4, FFF5
NO
FETCH VECTOR
FETCH VECTOR
$FFF2, FFF3
Low-Power Operation
YES
RTII = 1 ?
NO
REAL-TIME
YES
INTERRUPT
?
NO
FETCH VECTOR
$FFF0, FFF1
YES
IC1I = 1 ?
NO
TIMER
YES
IC1F ?
NO
FETCH VECTOR
$FFEE, FFEF
YES
IC2I = 1 ?
NO
TIMER
YES
IC2F ?
NO
FETCH VECTOR
$FFEC, FFED
YES
IC3I = 1 ?
NO
TIMER
YES
IC3F ?
NO
FETCH VECTOR
$FFEA, FFEB
YES
OC1I = 1 ?
NO
2A
TIMER
YES
OC1F ?
NO
FETCH VECTOR
$FFE8, FFE9
2B
Figure 5-6. Interrupt Priority Resolution (Sheet 1 of 2)
M68HC11E Family Data Sheet, Rev. 5.1
Freescale Semiconductor
93