ICS954101 Datasheet, PDF (12/16 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Desktop P4 Systems

Integrated
Circuit
Systems, Inc.
ICS954101
I²C Table: Read-Back Register
Byte 0
Pin #
Bit 7
35,36
Bit 6
32,33
Bit 5
30,31
Bit 4
26,27
Bit 3
24,25
Bit 2
22,23
Bit 1
19,20
Bit 0
-
Name
CPUCLK2/RCCLK7 Enable
SRCCLK6 Enable
SRCCLK5 Enable
SRCCLK4 Enable
SRCCLK3 Enable
SRCCLK2 Enable
SRCCLK1 Enable
Control Function Type
Output Enable
RW
Output Enable
RW
Output Enable
RW
Output Enable
RW
Output Enable
RW
Output Enable
RW
Output Enable
RW
RESERVED
0
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
DISABLE
1
ENABLE
ENABLE
ENABLE
ENABLE
ENABLE
ENABLE
ENABLE
I²C Table: Spreading and Device Behavior Control Register
Byte 1
Pin #
Name
Bit 7
54
PCI_F0 Enable
Bit 6
14,15
DOT_96MHz
Bit 5
12
USB_48MHz Enable
Bit 4
52
REFOUT Enable
Bit 3
Bit 2
40,41
CPUT1/CPUC1
Bit 1
43,44
CPUT0/CPUC0
Bit 0
-
Spread Spectrum Mode
I²C Table: Output Control Register
Byte 2
Pin #
Bit 7
5
Bit 6
4
Bit 5
3
Bit 4
56
Bit 3
55
Bit 2
54
Bit 1
10
Bit 0
9
Name
PCICLK5
PCICLK4
PCICLK3
PCICLK2
PCICLK1
PCICLK0
PCI_F2 Enable
PCI_F1 Enable
I²C Table: Output Control Register
Byte 3
Pin #
Name
Bit 7
35,35
CPU_ITP/SRCCLK7
Bit 6
32,33
SRCCLK6
Bit 5
30,31
SRCCLK5
Bit 4
26,27
SRCCLK4
Bit 3
24,25
SRCCLK3
Bit 2
22,23
SRCCLK2
Bit 1
19,20
SRCCLK1
Bit 0
-
Control Function
Output Enable
Output Enable
Output Enable
Output Enable
RESERVED
Output Enable
Output Enable
Spread Off
Type
RW
RW
RW
RW
RW
RW
RW
0
Disable
Disable
Disable
Disable
Disable
Disable
SPREAD OFF
1
Enable
Enable
Enable
Enable
Enable
Enable
SPREAD
ON
Control Function
Output Enable
Output Enable
Output Enable
Output Enable
Output Enable
Output Enable
Output Enable
Output Enable
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
Disable
Disable
Disable
Disable
Disable
Disable
Disable
Disable
1
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Control Function
Free-Running
Control
default:
not affected by
PCI/SRC_STOP
(Byte 6, bit 3)
RESERVED
Type
RW
RW
RW
RW
RW
RW
RW
0
Free-Running
Free-Running
Free-Running
Free-Running
Free-Running
Free-Running
Free-Running
1
Stoppable
Stoppable
Stoppable
Stoppable
Stoppable
Stoppable
Stoppable
PWD
1
1
1
1
1
1
1
PWD
1
1
1
1
1
1
1
0
PWD
1
1
1
1
1
1
1
1
PWD
0
0
0
0
0
0
0
0
0815D—06/21/04
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