ICS952011 Datasheet, PDF (18/25 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for P4 processor

Integrated
Circuit
Systems, Inc.
ICS952011
I²C Table: Slew Rate Control Register
Byte 21
Pin #
Name
Control
Function
Type
0
Bit 7
-
Bit 6
-
24/48Slw1
24/48 Slew Rate Control
RW
-
24/48Slw0
RW
-
Bit 5
-
Bit 4
-
AGPSlw1
AGP Slew Rate Control
RW
-
AGPSlw0
RW
-
Bit 3
-
Bit 2
-
ZCLKSlw1
ZCLK Slew Rate Control
RW
-
ZCLKSlw0
RW
-
Bit 1
-
Bit 0
-
REFSlw1
REF Slew Rate Control
RW
-
REFSlw0
RW
-
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
30
Bit 4
31
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
26
Bit 5
47
Bit 4
27
Bit 3
26
Bit 2
4
Bit 1
3
Bit 0
2
MultSel1
SEL24_48
SDRAM_OUT
12_48MHz
24_48MHz
REF2
REF1
REF0
Control
Function
IREF X plier Control
24MHz or 48MHz
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
I²C Table: Output Control Register
Byte 24
Pin #
Name
Bit 7
27
Bit 6
-
Bit 5
Bit 4
-
SEL12_48
FS6
FS5
Reserved
Bit 3
45,33
STOP_PD Swap
Bit 2
-
Bit 1
-
SS_SEL
SS_SEL
Bit 0
-
MultSel0
Control
Function
12MHz or 48MHz
Freq Select bit 6
Freq Select bit 5
Reserved
Swap CPU_STOP# and
PD# location
SS Scheme Select1
SS Scheme Select1
IREF X plier Control
Type
RW
RW
RW
RW
RW
RW
RW
RW
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
1
See Table 6
48MHz
Disable
Disable
Disable
Disable
Disable
Disable
24MHz
Enable
Enable
Enable
Enable
Enable
Enable
PWD
0
1
1
1
1
1
1
1
0
1
48MHz
12MHz
See Table 1
-
-
Stop-Pin33 Stop-Pin45
PD#-Pin45 PD#-Pin33
See Table 2: Spread
Spectrum Selection Table
See Table 6: MultSel
Selection Table
PWD
0
0
0
0
1
0
0
1
0721A—07/29/03
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