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8XC251SA, SB, SP, SQ USER’S MANUAL
6-2
Figure 6-1. Interrupt Control System
IE0
0
1
INT0#
Timer 0
IE1
0
1
INT1#
Timer 1
0
1
0
1
ECF
ECCF
x
IT0
IT1
5
A4149-01
IP
Interrupt Enable
Priority Enable
EX0
ET0
EX1
ET1
EC
ES
ET2
TF0
CF
CCF
x
RI
TI
TF2
EXF2
TF1
PCA
Counter
Overflow
PCA
Match or
Capture
Receive
Transmit
Timer 2
T2EX
Interrupt Polling Sequence
Highest
Priority
Interrupt
Lowest
Priority
Interrupt
EA