ICS952801 Datasheet, PDF (15/22 Pages) Integrated Circuit Systems – Programmable Timing Control HubTM for K8TM processor

Integrated
Circuit
Systems, Inc.
I²C Table: Slew Rate Control Register
Byte 21
Pin #
Name
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
24/48Slw1
24/48Slw0
AGPSlw1
AGPSlw0
ZCLKSlw1
ZCLKSlw0
REFSlw1
REFSlw0
Control
Function
24/48 Slew Rate
Control
AGP Slew Rate Control
ZCLK Slew Rate
Control
REF Slew Rate Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
ICS952801
Advance Information
0
1
PWD
-
-
0
-
-
0
-
-
0
-
-
0
-
-
0
-
-
0
-
-
0
-
-
0
I²C Table: Slew Rate Control Register
Byte 22
Pin #
Name
Bit 7
-
Bit 6
-
Bit 5
34
Bit 4
35
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
SDSlw1
SDSlw0
AGPCLK1
AGPCLK0
PCI_FSlw1
PCI_FSlw0
PCISlw1
PCISlw0
Control
Function
SD Slew Rate Control
Output Control
Output Control
PCI_F Slew Rate
Control
PCI Slew Rate Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
-
-
Disable
Disable
-
-
-
-
1
-
-
Enable
Enable
-
-
-
-
PWD
0
0
1
1
0
0
0
0
I²C Table: Output Control Register
Byte 23
Pin #
Name
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
30
Bit 3
29
Bit 2
4
Bit 1
3
Bit 0
2
Reserved
SEL24_48
Reserved
48MHz
24_48MHz
REF2
REF1
REF0
I²C Table: Reserved Register
Byte 24
Pin #
Name
Bit 7
-
Bit 6
-
Bit 5
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Reserved
FS6
FS5
Reserved
Reserved
SS_SEL
SS_SEL
Reserved
Control
Function
Reserved
24MHz or 48MHz
Reserved
Output Control
Output Control
Output Control
Output Control
Output Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
-
48MHz
-
Disable
Disable
Disable
Disable
Disable
1
-
24MHz
-
Enable
Enable
Enable
Enable
Enable
PWD
0
1
1
1
1
1
1
1
Control
Function
Reserved
Freq Select bit 6
Freq Select bit 5
Reserved
Reserved
SS Scheme Select1
SS Scheme Select1
Reserved
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1
-
-
See Table 1
-
-
-
-
See Table 2: Spread
Spectrum Selection Table
-
-
PWD
0
0
0
0
0
0
0
0
0719—01/22/03
15