ICS952621 Datasheet, PDF (10/15 Pages) Integrated Circuit Systems – Programmable Timing Control Hub™ for Next Gen P4™ processor

Integrated
Circuit
Systems, Inc.
ICS952621
I²C Table: Output Control Register
Byte 4
Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
48MHz_USB
2x output drive
48MHz_USB
RESERVED
RESERVED
RESERVED
PCICLK_F2
PCICLK_F1
PCICLK_F0
Control Function
0=2x drive
Output Control
RESERVED
RESERVED
RESERVED
Output Control
Output Control
Output Control
Type
RW
RW
-
-
-
RW
RW
RW
0
1
2x drive 1xdrive
Disable Enable
RESERVED
RESERVED
RESERVED
stoppable Free-run
stoppable Free-run
stoppable Free-run
PWD
1
1
X
X
X
1
1
1
I²C Table: Output Control Register
Byte 5
Pin #
Name
Bit 7
DOT_48MHZ
Bit 6
CPU_T/C_ITP
Bit 5
3V66_3/VCH
Frequency Select
Bit 4
3V66_3/VCH
Frequency Select
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED
3V66_2
3V66_1
3V66_0
Control Function
Output Control
Output Control
Output Select
Output Control
RESERVED
Output Control
Output Control
Output Control
Type
RW
RW
RW
RW
-
RW
RW
RW
0
Disable
Disable
3V66
1
Enable
Enable
VCH
Disable Enable
RESERVED
Disable Enable
Disable Enable
Disable Enable
PWD
1
1
0
1
X
1
1
1
I²C Table: Output Control and Fix Frequecy Register
Byte 6
Pin #
Name
Bit 7
Test Clock Mode
Bit 6
RESERVED
Bit 5
CPU *2 Test Clock
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SRC Frequency Select
Spread Spectrum Type
Spread Spectrum Mode
REF1
REF0
Control Function
Test Clock Mode
-
FS_A and FS_B
Operation
SRC Frequency
Select
Down/Center
Spread Spectrum
Enable
Output Control
Output Control
Type
-
-
-
-
-
RW
RW
0
Disable
-
1
Enable
-
Normal Test Mode
PWD
0
0
0
100MHz 200MHz
0
Down
Center
0
Spread Spread
0
OFF
ON
Disable Enable
1
Disable Enable
1
I²C Table: Vendor & Revision ID Register
Byte 7
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
-
-
-
-
-
-
-
-
Name
RID3
RID2
RID1
RID0
VID3
VID2
VID1
VID0
0756A—09/10/04
Control Function
Type
0
R
-
REVISION ID
R
-
R
-
R
-
R
-
VENDOR ID
R
R
-
-
R
-
10
1
PWD
-
0
-
0
-
0
-
0
-
0
-
0
-
0
-
1