ICS952606 Datasheet, PDF (12/20 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Next Gen P4 processor

Integrated
Circuit
Systems, Inc.
ICS952606
I²C Table: Read-Back Register
Byte 0
Pin #
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Name
Control Function
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
FSB
Freq Select 1 Read
Back
FSA
Freq Select 0 Read
Back
Type
-
-
-
R
R
R
R
R
0
1
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
READBACK of
CPU(2:0) Frequency
PWD
X
X
X
X
X
X
X
X
I²C Table: Spreading and Device Behavior Control Register
Byte 1
Bit 7
Bit 6
Pin #
Name
SRC/SRC#
SRC
Control Function
SRC Free-Running
Control
Output Control
Bit 5
RESERVED
Bit 4
RESERVED
Bit 3
RESERVED
Bit 2
RESERVED
Bit 1
CPUT1/CPUC1
Output Control
Bit 0
CPUT0/CPUC0
Output Control
Type
RW
RW
R
R
R
R
RW
RW
0
1
FREE-RUN
STOPPAB
LE
Disable Enable
RESERVED
RESERVED
RESERVED
RESERVED
Disable Enable
Disable Enable
PWD
0
1
X
X
X
X
1
1
I²C Table: Output Control Register
Byte 2
Pin #
Bit 7
Name
SRC_PD#
Drive Mode
Bit 6
SRC_Stop#
Drive Mode
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED
CPUT1_PD# Drive Mode
CPUT0_PD# Drive Mode
RESERVED
RESERVED
RESERVED
Control Function
0: Driven in PD#
0: Driven in PCI_Stop#
(byte3bit7)
RESERVED
0:driven in PD#
1: Tri-stated
RESERVED
RESERVED
RESERVED
Type
RW
RW
-
RW
RW
-
-
-
0
1
Driven
Hi-Z
Driven
Hi-Z
RESERVED
Driven
Hi-Z
Driven
Hi-Z
RESERVED
RESERVED
RESERVED
PWD
0
0
X
0
0
X
X
X
I²C Table: Output Control Register
Byte 3
Pin #
Name
Bit 7
PCI_Stop#
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESERVED
PCICLK5
PCICLK4
PCICLK3
PCICLK2
PCICLK1
PCICLK0
Control Function
PCI_Stop# Control
0:all stoppable PCI are
stopped
RESERVED
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Type
RW
-
RW
RW
RW
RW
RW
RW
0
1
Enable Disable
RESERVED
Disable
Disable
Disable
Enable
Enable
Enable
Disable Enable
Disable Enable
Disable Enable
PWD
1
X
1
1
1
1
1
1
0717F—06/10/05
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