ics9248-107 Integrated Device Technology, ics9248-107 Datasheet - Page 5

• Manufacturer Part Number: ics9248-107
• Description: Frequency Timing Generator For Pentium Ii Systems
• Manufacturer: Integrated Device Technology

Notes:
1. Inactive means outputs are held LOW and are disabled
Byte 1: CPU, Active/Inactive Register
(1 = enable, 0 = disable)
Notes:
1. Inactive means outputs are held LOW and are disabled
Byte 3: 3V66 Active/Inactive Register
(1 = enable, 0 = disable)
Notes:
1. Inactive means outputs are held LOW and are disabled
Byte 5: Active/Inactive Register
(1= enable, 0 = disable)
from switching.
from switching.
from switching.
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
i
i
i
i
i
t i
i
i
i
t i
t i
t i
6 t
4 t
2 t
0 t
7 t
5 t
3 t
1 t
4
2
0
7
6
5
3
1
7
6
5
4
3
2
0
1
P
P
n i
n i
4 3
2 3
P
3 3
2
3
-
-
-
-
-
-
-
-
-
-
-
n i
0 4
8 3
7 3
2 4
7 4
6 4
4 4
-
#
#
#
P
P
W
W
X
X
X
1
1
1
1
1
1
1
1
1
1
1
1
1
D
D
P
W
X
1
1
1
1
1
1
1
D
3
3
3
R
R
R
R
R
R
R
R
R
R
F
F
F
V
V
V
S
S
S
E
E
s e
s e
s e
s e
s e
s e
s e
s e
# 1
# 3
# 2
6 6
6 6
6 6
F
F
r e
r e
r e
r e
r e
r e
r e
r e
0
1
0 _
1 _
2 _
e v
e v
e v
e v
e v
e v
e v
e v
D
D
d
d
d
d
d
d
d
d
e
e
c s
(
(
(
(
(
(
(
(
D
c s
C
C
C
C
R (
N
N
N
N
N
N
N
N
I
I
I
e
P
P
P
P
i r
O
O
i r
O
t o
t o
t o
t o
t o
t o
t o
t o
c s
U
U
U
U
s e
A
A
A
t p
t p
i r
) e
) e
) e
) e
) e
) e
) e
) e
C
C
C
C
r e
P
P
P
o i
o i
t p
L
L
L
L
C I
C I
C I
e v
n
K
K
K
K
n
o i
0
2
) d
1
n
1
2
3
0
5
Byte 4: PCI Active/Inactive Register
(1 = enable, 0 = disable)
Byte 2: PCI Active/Inactive Register
(1 = enable, 0 = disable)
Notes:
1. Inactive means outputs are held LOW and are disabled
Notes:
1. Inactive means outputs are held LOW and are disabled
Byte6: Active/Inactive Register
(1= enable, 0 = disable)
Note: Don’t write into this register, writing into this register
from switching.
B
B
B
B
B
B
B
from switching.
B
B
B
B
B
B
B
B
B
B
B
i B
i B
i B
i B
i B
i B
i B
i B
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
t i
B
t i
t i
t i
7
6
5
4
3
2
1
0
7
6
5
4
2
0
7 t
6 t
5 t
4 t
3 t
2 t
1 t
0 t
3
1
can cause malfunction
P
P
n i
1
1
1
1
1
1
P
9
8
n i
6 2
7 2
2 2
0 2
1 2
4
2
8
7
5
1
-
-
-
n i
-
-
-
-
-
-
-
-
#
#
#
P
W
P
1
1
1
1
1
1
1
1
P
W
X
X
D
1
1
1
1
1
1
W
0
0
0
0
0
0
1
1
D
D
P
P
P
P
P
P
P
P
C
C
C
C
C
C
C
C
2
8 4
F
R (
P
P
P
F
R
R
R
R
R
R
R
R
_ 4
I
I
I
I
I
I
I
I
S
C
C
C
S
C
C
C
C
C
C
C
C
M
s e
# 0
# 4
e
e
e
e
e
e
e
e
C I
C I
C I
8 4
e s
e s
e s
e s
e s
e s
e s
e s
L
L
L
L
L
L
L
L
r e
H
ICS9248-107
L
L
L
K
K
K
K
K
K
K
K
M
e v
z
v r
v r
v r
v r
v r
v r
v r
v r
K
K
K
7
6
5
4
3
2
1
_
D
H
) d
0 1
9
8
d e
d e
d e
d e
d e
d e
d e
d e
D
F
e
D
z
e
c s
e
c s
(
(
(
(
(
(
(
(
c s
i r
N
N
N
N
N
N
N
N
i r
t p
i r
t o
t o
t o
t o
t o
t o
t o
t o
t p
t p
o i
) e
) e
) e
) e
) e
) e
) e
) e
o i
n
o i
n
n