TMP91C824
91C824-46
2008-02-20
Figure 3.4.3 Block Diagram of Interrupt Controller
Int
er
rupt
reques
t
s
ignal t
o C
PU
if
I
FF
=
7
t
hen
0
M
icro DM
A
sta
rt
v
e
c
tor setti
ng re
gis
ter
IN
TP
1
IN
TTC
0
IN
TTC
1
IN
TTC
2
IN
TTC
3
V
=
84H
V
=
88H
V
=
8
CH
V
=
90H
V
=
94H
S
o
ft
sta
rt
Mi
c
ro
DM
A
co
u
n
te
r
ze
ro
int
e
rru
p
t
6
INTTC
0
Du
ri
n
g
IDL
E
1
32
3
3
3
1
6
1
7
2
2
4
6
34
4 input
O
R
INT
0
,
1
, 2
,
3
, RT
C
, A
L
M
M
ic
ro
D
M
A
c
hannel
pr
iorit
y
en
c
o
d
e
r
Priorit
y
en
c
oder
D
M
A0V
D
M
A1V
D
M
A2V
D
M
A3V
R
ESET
Int
er
rupt
r
eques
t
F
/F
RE
S
E
T
D
ec
oder
Re
se
t
P
ri
o
ri
ty
s
e
tt
in
g
r
e
g
is
te
r
V
=
20
H
V
=
24
H
In
te
rr
upt
c
o
nt
roller
CP
U
S
Q
R
V
=
28
H
V
=
2C
H
V
=
30
H
V
=
34
H
V
=
38
H
V
=
3C
H
V
=
40
H
V
=
44
H
V
=
48
H
V
=
4C
H
D Q
CL
R
Y1
Y2
Y3
Y4
Y5
Y6
A
B
C
Dn
Dn
+
1
Dn
+
2
In
te
rr
u
p
t
reque
s
t F
/F
In
te
rru
p
t v
e
c
tor read
M
ic
ro
D
M
A
ac
k
no
w
ledge
Int
err
upt
req
ues
t
F
/F
Dn
+
3
A
B
C
int
e
rrupt
v
e
c
tor
r
e
ad
D2
D3
D4
D5
D6
D7
Se
le
c
to
r
S
Q
R
0
1
2
3
A
B
D0
D1
In
te
rr
u
p
t ve
c
to
r
read
In
te
rr
u
p
t
m
a
sk
F/
F
M
ic
ro
D
M
A
requ
es
t
H
A
L
T
r
el
eas
e
NM
I
if IN
T
R
Q
2
to
0
≥
IF
F 2
to
0
th
e
n
1
.
IN
T
R
Q
2
t
o
0
IFF2
:0
In
te
rr
upt
lev
e
l de
tec
t
RE
S
E
T
EI
1
to
7
DI
Int
e
rrup
t reque
s
t
s
ignal
Du
ri
n
g
ST
O
P
M
ic
ro
D
M
A
c
han
nel
s
pec
if
ic
at
ion
R
ESET
NM
I
IN
T
W
D
IN
T0
IN
T1
IN
T2
IN
T3
IN
TA
L
M0
IN
TA
L
M1
IN
TA
L
M2
IN
TA
L
M3
IN
TA
L
M4
IN
TTA
0
S
In
te
rr
u
p
t
ve
c
to
r
gener
at
or
Hi
g
h
es
t
prio
rity
inter
ru
p
t
leve
l s
e
le
c
t
1
2
3
4
5
6
7
D5
D4
D3
D2
D1
D0
D
Q
CL
R