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INTERRUPT
INPUTS
APPLICATION EXAMPLES
12
13
14
15
10
1
2 3
4
23
Bo
Bl
B2
SGS
ECS
I~
Rii
1-*
iii
17
ii2
I~
R3
AO
8
27
I~
ii4
8214
Al
9 28
20
fi5
AZ
10
29
!-f,-
'7
ii6
INT
5
~
--=0.
ii7
S
Q
El
TG
INTE
ElR
ClK
L-.(:
R
Or--
,-tf
~r
9
RS
FLIP FLOP
+5V
_
DBO
OBI
OB2
DB3
WR
8049
8048
8748
8035
8039
Pl0
Pll
P12
INT
ALE
J
• Processor polls Port 1 to determine interrupting device
• Processor
sets
priority level by writing 4-bits to 8214
MULTIPLE INTERRUPTS WITH PRIORITY LEVELS
5·6