ICS950405 Datasheet, PDF (6/16 Pages) Integrated Circuit Systems – AMD - K8 System Clock Chip

ICS950405
I²C Table: Frequency Select Register
Byte 0
Pin #
Name
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
SS_EN
SEL24_48MHz
Reserved
Reserved
FS3
FS2
FS1
FS0
Control Function
Spread Enable
Output Select
Reserved
Reserved
Freq Select Bit 3
Freq Select Bit 2
Freq Select Bit 1
Freq Select Bit 0
Type
0
1
RW
OFF
ON
RW
48MHz
24MHz
RW
Reserved
Reserved
RW
Reserved
Reserved
RW
RW _{See Table1: Frequency Selection Table}
RW
RW
I²C Table: Output Control Register
Byte 1
Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1
REF0
6
HTTCLK0
7
PCICLK8/HTTCLK1
8
PCICLK9/HTTCLK2
11
PCICLK11/HTTCLK3
12
PCICLK10
13
PCICLK0
14
PCICLK1
Control Function
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
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
I²C Table: Output Control Register
Byte 2
Pin #
Name
Bit 7
17
Bit 6
18
Bit 5
21
Bit 4
22
Bit 3
23
Bit 2
24
Bit 1
28
Bit 0
31
PCICLK2
PCICLK3
PCICLK4
PCICLK5
PCICLK6
PCICLK7
24_48MHz
48MHz
Control Function
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
Output Control
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
I²C Table: Output Control Register
Byte 3
Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
37,36
41,40
45
48
-
-
-
-
CPUCLK8T/C_1
CPUCLK8T/C_0
REF2
REF1
PCI_Str1
PCI_Str0
PCI_Str1
PCI_Str0
Control Function Type
Output Control
RW
Output Control
RW
Output Control
RW
Output Control
RW
PCI9,8 Strength
RW
Control only
RW
PCI11 Strength Control RW
only
RW
0
Disable
Disable
Disable
Disable
00: 0.5X Drive
01: 1.0X Drive
00: 0.5X Drive
01: 1.0X Drive
1
Enable
Enable
Enable
Enable
10: 1.5X Drive
11: 2.0X Drive
10: 1.5X Drive
11: 2.0X Drive
PWD
1
Latch
X
X
Latch
Latch
Latch
Latch
PWD
1
1
1
1
1
1
1
1
PWD
1
1
1
1
1
1
1
1
PWD
1
1
1
1
0
1
0
1
0802F—04/22/05
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