ICS952623 Datasheet, PDF (13/27 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Next Gen P4 processor

Integrated
Circuit
Systems, Inc.
ICS952623
Advance Information
I²C Table: Output Control and Fix Frequency Register
Byte 6
Pin #
Name
Control Function
Bit 7
1,2,7,8,9,12,13,14,
15,18,19,20,22,23,2
6,27,29,31,32,37,38
,40,41,43,44,46,47
Test Clock Mode
Test Clock Mode
Bit 6
-
Bit 5 40,41,43,44,46,47
RESERVED
RESERVED
Bit 4
37,38
RESERVED
Bit 3
Bit 2
Spread Type
7,8,9,12,13,14,15,1
8,19,20,22,23,26,27
,29,31,32,37,38,40, ^{Spread Spectrum Mode}
41,43,44,46,47
-
FS_A and FS_B
Operation
SRC Frequency
Select
Down/Center
Bit 1
2
Bit 0
1
REF1
REF0
Output Control
Output Control
Type
-
-
-
-
-
RW
RW
0
1
Disable
Enable
-
Normal
100MHz
Down
Spread
OFF
Disable
Disable
-
Test Mode
200MHz
Center
Spread
ON
Enable
Enable
PWD
0
0
0
0
0
0
1
1
I²C Table: Vendor & Revision ID Register
Byte 7
Pin #
Name
Bit 7
-
RID3
Bit 6
-
RID2
Bit 5
-
RID1
Bit 4
-
RID0
Bit 3
-
VID3
Bit 2
-
VID2
Bit 1
-
VID1
Bit 0
-
VID0
Control Function
Type
0
R
-
REVISION ID
R
-
R
-
R
-
R
-
VENDOR ID
R
-
R
-
R
-
1
PWD
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
1
I²C Table: Byte Count Register
Byte 8
Pin #
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Name
BC7
BC6
BC5
BC4
BC3
BC2
BC1
BC0
Control Function
Type
0
RW
-
Writing to this register ^RW
-
will configure how
RW
-
many bytes will be
RW
-
read back, default is
RW
-
08 = 8 bytes.
RW
-
RW
-
RW
-
1
PWD
-
0
-
0
-
0
-
0
-
1
-
0
-
0
-
0
0758—02/08/05
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