ics9248-102 Integrated Device Technology, ics9248-102 Datasheet - Page 5

• Manufacturer Part Number: ics9248-102
• Description: Motherboard Single Chip Clock Solution For Pentium Ii/iii And K6 Processors, Using Sis540/sis630 Style Chipset
• Manufacturer: Integrated Device Technology

Byte 3: SDRAM, Active/Inactive Register
(1= enable, 0 = disable)
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
Byte 1: CPU, Active/Inactive Register
(1= enable, 0 = disable)
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
load of the input frequency select pin conditions.
B
B
B
B
B
B
B
B
B
from switching.
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
T I
t i
t i
t i
t i
t i
t i
t i
t i
T I
T I
6
4
2
0
7
5
3
1
7
6
5
4
3
2
0
1
6
4
2
0
7
5
3
1
I P
I P
I P
8 4
2 3
9 2
8 2
0 2
2
3 4
5 4
6 4
1 3
1 2
8 1
7 1
N
-
-
-
-
-
-
N
N
-
-
-
-
-
#
#
#
P
P
W
P
1
1
1
1
1
1
1
1
W
1
1
1
1
1
1
1
1
W
D
1
1
1
1
1
1
1
1
D
D
R
R
F
F
F
F
R
R
S
(
(
R
R
R
C
C
C
R
S
S
S
S
e
e
E
E
8 4
4 2
S
S
S
S
S
S
S
S
E
e s
e s
# 3
# 2
# 1
# 0
e
e
e
P
P
P
e
F
F
D
D
D
D
D
D
D
D
L
e s
e s
e s
e s
U
U
U
1
0
M
M
v r
v r
R
R
R
R
R
R
R
R
4 2
C
C
C
v r
v r
v r
v r
(
(
H
H
d e
d e
A
A
A
A
A
A
A
A
D
A
A
L
L
L
D
4 _
d e
d e
d e
d e
z
z
M
M
M
M
M
M
M
M
E
D
/ t c
/ t c
K
K
K
E
w
w
S
# 8
E
2
1
0
S
7
6
5
4
3
2
1
0
n I
n I
C
h
h
S
C
(
(
(
n e
n e
(
(
(
(
(
(
(
(
R
c a
c a
A
A
A
C
R
A
A
A
A
A
A
A
A
P I
/ t c
/ t c
/ t c
R
) t
) t
P I
/ t c
/ t c
/ t c
/ t c
/ t c
/ t c
/ t c
/ t c
s
s
P I
t e
t e
I T
n I
n I
n I
I T
n I
n I
n I
n I
n I
n I
n I
n I
I T
o t
o t
O
c a
c a
c a
O
c a
c a
c a
c a
c a
c a
c a
c a
O
N
) t
) t
) t
N
) 0
) 1
) t
) t
) t
) t
) t
) t
) t
) t
N
5
Byte 4: 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
Byte 2: PCI, Active/Inactive Register
(1= enable, 0 = disable)
B
B
B
B
B
B
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
B
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
t i
T I
T I
7 t
6 t
5 t
4 t
3 t
2 t
0 t
1 t
7
6
5
4
2
0
3
1
7
6
5
4
3
2
0
1
register can cause malfunction
I P
I P
I P
5 2
6 2
1 4
0 4
8 3
7 3
5 3
4 3
N
4 1
2 1
3 1
1 1
9
7
8
N
-
N
-
-
-
-
-
-
-
-
#
#
#
P
P
P
W
W
1
1
1
1
1
1
1
1
W
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
D
D
D
2
8 4
S
S
S
S
S
S
C (
P
P
P
P
P
P
P
R
R
R
R
R
R
R
R
_ 4
D
D
D
D
D
D
C
C
C
C
C
C
C
M
e
e
e
e
e
e
e
e
R
R
R
R
R
R
P
8 4
e s
e s
e s
e s
e s
e s
e s
e s
C I
C I
C I
C I
C I
C I
C I
H
A
A
A
A
A
A
U
v r
v r
v r
v r
v r
v r
v r
v r
ICS9248-102
M
L
L
z
M
M
M
M
M
M
2
L
L
L
L
L
D
D
D
5 .
d e
d e
d e
d e
d e
d e
d e
d e
K
K
K
K
K
K
K
H
3 1
2 1
1 1
0 1
9
8
E
E
E
3 _
6
5
4
3
2
1
0
z
S
S
S
(
(
(
(
(
(
(
(
C
(
(
(
(
(
(
(
N
N
N
N
N
N
N
N
3 .
C
C
A
A
A
A
A
A
A
R
t o
t o
t o
t o
t o
t o
t o
t o
R
) #
R
/ t c
/ t c
/ t c
/ t c
/ t c
/ t c
/ t c
P I
) e
) e
) e
) e
) e
) e
) e
) e
P I
P I
n I
n I
n I
n I
n I
n I
n I
I T
I T
I T
c a
c a
c a
c a
c a
c a
c a
O
O
O
) t
) t
) t
) t
) t
) t
) t
N
N
N