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ICS952623 Datasheet(PDF) 11 Page - Integrated Circuit Systems

Part # ICS952623
Description  Programmable Timing Control Hub for Next Gen P4 processor
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Manufacturer  ICST [Integrated Circuit Systems]
Direct Link  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS952623 Datasheet(HTML) 11 Page - Integrated Circuit Systems

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11
Integrated
Circuit
Systems, Inc.
ICS952623
Advance Information
0758—02/08/05
I
2C Table: Read-Back Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
RESERVED
RESERVED
-
X
Bit 6
RESERVED
RESERVED
-
X
Bit 5
RESERVED
RESERVED
-
X
Bit 4
RESERVED
RESERVED
-
X
Bit 3
PCI_STOP#
PCI STOP# Read
Back
RX
Bit 2
CPU_STOP#
CPU STOP Read
Back
RX
Bit 1
FSB
Freq Select 1 Read
Back
RX
Bit 0
FSA
Freq Select 0 Read
Back
RX
I
2C Table: Spreading and Device Behavior Control Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
SRC/SRC#
SRC Free-Running
Control
RW
FREE-RUN
STOPPABLE
0
Bit 6
SRC
Output Control
RW
Disable
Enable
1
Bit 5
CPUT2/CPUC2
RW
FREE-RUN
STOPPABLE
1
Bit 4
CPUT1/CPUC1
RW
FREE-RUN
STOPPABLE
1
Bit 3
CPUT0/CPUC0
RW
FREE-RUN
STOPPABLE
1
Bit 2
CPUT2/CPUC2
Output Control
RW
Disable
Enable
1
Bit 1
CPUT1/CPUC1
Output Control
RW
Disable
Enable
1
Bit 0
CPUT0/CPUC0
Output Enable
RW
Disable
Enable
1
I
2C Table: Output Control Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
SRC_PD#
Drive Mode
0: Driven in PD#
RW
Driven
Hi-Z
0
Bit 6
SRC_Stop#
Drive Mode
0: Driven in
PCI_Stop#
RW
Driven
Hi-Z
0
Bit 5
CPUT2_PD# Drive
Mode
RW
Driven
Hi-Z
0
Bit 4
CPUT1_PD# Drive
Mode
RW
Driven
Hi-Z
0
Bit 3
CPUT0_PD# Drive
Mode
RW
Driven
Hi-Z
0
Bit 2
CPUT2_Stop Drive
Mode
RW
Driven
Hi-Z
0
Bit 1
CPUT1_Stop Drive
Mode
RW
Driven
Hi-Z
0
Bit 0
CPUT0_Stop Drive
Mode
RW
Driven
Hi-Z
0
RESERVED
0:driven when stopped
1: Tri-stated
0:driven in PD#
1: Tri-stated
-
READBACK
READBACK of CPU(2:0)
Frequency
READBACK
RESERVED
RESERVED
-
RESERVED
-
-
-
Byte 0
-
-
-
Byte 1
37,38
37,38
46,47
43,44
40,41
Byte 2
37,38
37,38
CPU FREE-RUNNING
CONTROL
43,44
40,41
46,47
46,47
43,44
40,41
46,47
43,44
40,41


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