ICS951402 Datasheet, PDF (7/23 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for P4 processor

Integrated
Circuit
Systems, Inc.
ICS951402
Advance Information
I²C Table: Reserved Register
Byte 3 ^{Pin #}
Name
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Control
Function
Type
0
Reserved
RW
-
Reserved
RW
-
Reserved
RW
-
Reserved
RW
-
Reserved
RW
-
Reserved
RW
-
Reserved
RW
-
Reserved
RW
-
1
PWD
-
1
-
1
-
1
-
1
-
1
-
1
-
1
-
1
I²C Table: Functionality and Frequency Select Register
Byte 4
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
-
-
-
-
-
-
-
-
Name
FS3
FS2
FS1
FS0
FS Source
FS4
SS_EN
All Outputs
Control
Function
Freq Select Bit 7
Freq Select Bit 6
Freq Select Bit 5
Freq Select Bit 4
Frequency H/W or
IIC Select
Freq Select Bit 2
SPREAD Enable
Output Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1
See
Frequency Table
Latch Input IIC
See Frequency Table
OFF
ON
Normal Tri-state
Note: If Byte4 bit1 = 0 then FS4=0
PWD
0
0
0
0
0
0
1
0
I²C Table: Output Control and Read Back Register
Byte 5 ^{Pin #}
Name
Control
Function
Type
Bit 7
31
AGP1
Output Control RW
Bit 6
32
Bit 5
26
Bit 4
-
Bit 3
-
AGP0
24_48#SEL
FS4RB
FS3RB
Output Control RW
24 or 48 Select RW
FS4 Read back
R
FS3 Read back
R
Bit 2
-
FS2RB
FS2 Read back
R
Bit 1
-
FS1RB
FS1 Read back
R
Bit 0
-
FS0RB
FS0 Read back
R
0
Disable
Disable
48MHz
-
-
-
-
-
1
Enable
Enable
24MHz
-
-
-
-
-
PWD
1
1
X
X
X
X
X
X
0660—05/05/05
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