ics9248-99 Integrated Device Technology, ics9248-99 Datasheet - Page 5

• Manufacturer Part Number: ics9248-99
• Description: Frequency Generator & Integrated Buffers For Celeron & Pii/iii
• Manufacturer: Integrated Device Technology

Byte 5: Peripheral , Active/Inactive Register
(1= enable, 0 = disable)
Notes:
1. Inactive means outputs are held LOW and are disabled
2. Latched Frequency Selects (FS#) will be inferted logic
0314C—09/18/03
Byte 0: CPU, Active/Inactive Register
(1= enable, 0 = disable)
Byte 2: PCI, Active/Inactive Register
(1= enable, 0 = disable)
load of the input frequency select pin conditions.
i B
i B
i B
i B
i B
i B
i B
from switching.
B
i B
i B
i B
i B
i B
i B
i B
i B
i B
i B
i B
i B
i B
i B
i B
B
i B
B
i B
T I
T I
T I
7 t
6 t
5 t
4 t
3 t
2 t
1 t
0 t
7 t
6 t
5 t
4 t
3 t
2 t
1 t
0 t
7 t
6 t
5 t
4 t
3 t
2 t
1 t
0 t
I P
2
I P
I P
, 1
3 2
9 1
8 1
7 1
5 1
4 1
2 1
0 1
1 1
N
-
-
-
-
-
-
N
N
-
-
-
-
-
-
-
-
2 2
#
#
#
P
P
P
W
W
W
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D
D
D
R
R
R
R
R
2
8 4
R
P
P
P
P
P
P
P
P
R
R
R
R
R
R
R
R
/ 4
C
C
C
C
C
C
C
C
e
e
e
e
e
e
e
e
e
e
e
e
e
e
M
e s
e s
e s
e s
e s
e s
e s
e s
e s
e s
e s
e s
e s
e s
8 4
C I
C I
C I
C I
C I
C I
C I
C I
H
v r
v r
v r
v r
v r
v r
v r
v r
v r
v r
v r
v r
v r
v r
M
L
L
L
L
L
L
L
L
D
z
D
D
d e
d e
d e
d e
d e
d e
d e
d e
d e
d e
d e
d e
d e
d e
K
K
K
K
K
K
K
K
H
E
E
E
7
6
5
4
3
2
1
0
z
S
S
S
C
C
C
R
R
R
P I
P I
P I
I T
I T
I T
O
O
O
N
N
N
5
Byte 1: SDRAM, Active/Inactive Register
(1= enable, 0 = disable)
Byte 3: Reserved , Active/Inactive Register
(1= enable, 0 = disable)
Byte 6: Peripheral , Active/Inactive Register
(1= enable, 0 = disable)
Note: Don’t write into this register, writing into this
B
i B
i B
i B
i B
i B
i B
i B
i B
B
i B
i B
i B
i B
i B
i B
i B
i B
B
i B
i B
i B
i B
i B
i B
i B
i B
T I
T I
T I
7 t
6 t
5 t
4 t
2 t
0 t
6 t
4 t
2 t
0 t
7 t
6 t
5 t
4 t
2 t
0 t
3 t
1 t
7 t
5 t
3 t
1 t
3 t
1 t
register can cause malfunction
I P
I P
I P
2 3
3 3
5 3
6 3
7 3
9 3
0 4
1 4
7 4
N
-
-
-
-
-
-
-
-
N
N
-
-
-
-
-
-
-
#
#
#
P
P
P
W
W
W
X
X
X
X
X
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
D
D
D
S
S
S
S
S
S
S
S
S (
=
R
R
R
R
R
R
R
R
R
F
F
F
I
F
F
I
F
O
O
D
D
D
D
D
D
D
D
S
S
S
R
1
R
S
e
e
e
e
e
e
e
e
e
E
A
A
=
e s
e s
e s
e s
e s
e s
e s
e s
e s
# 2
# 1
# 0
# 3
E
E
R
R
R
R
R
R
R
R
L
I >
P
P
Q
Q
A
A
A
A
A
A
A
A
v r
v r
v r
v r
v r
v r
v r
v r
v r
4 2
C I
C I
I _
O
I _
D
D
D
M
M
M
M
M
M
M
M
d e
d e
d e
d e
d e
d e
d e
d e
d e
ICS9248-99
4 _
A
=
E
E
E
O
O
7
6
5
4
3
2
1
0
P
S
S
(
(
(
(
(
(
(
(
S
# 8
A
A
P
N
N
N
N
N
N
N
N
C I
C
C
C
C
P
P
t o
t o
t o
t o
t o
t o
t o
t o
# )
R
R
R
C I
C I
C I
=
) e
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P I
P I
P I
P
=
L
C
I T
I T
0
I T
K
C I
=
O
O
O
>
L
N
N
N
K
2 /