ICS950703 Datasheet, PDF (12/24 Pages) Integrated Circuit Systems – PROGRAMMABLE TIMING CONTROL HUB FOR P4

Integrated
Circuit
Systems, Inc.
ICS950703
I²C Table: Output Control Register
Byte 3
Pin #
Name
Bit 7
26
48MHz_1
Bit 6
25
48MHz_0
Bit 5
-
Reserved
Bit 4
-
Reserved
Bit 3
55
3VMREF
Bit 2
54
3VMREF_B
Bit 1
21
PCICLK_9
Bit 0
20
PCICLK_8
Control Function
Output Control
Output Control
Reserved
Reserved
Output Control
Output Control
Output Control
Output Control
I²C Table: Output Control Register
Byte 4
Pin #
Name
Bit 7
3
REF1
Bit 6
2
REF0
Bit 5
-
Reserved
Bit 4
35
3V66_3
Bit 3
-
Reserved
Bit 2
34
3V66_2
Bit 1
31
3V66_1
Bit 0
30
3V66_0
Control Function
Output Control
Output Control
Reserved
Output Control
Reserved
Output Control
Output Control
Output Control
I²C Table: Output Control Register
Byte 5
Pin #
Name
Bit 7
-
Reserved
Bit 6
-
PLL2EN
Bit 5
-
AEN
Bit 4
-
Bit 3
-
Bit 2
-
AFS4
AFS3
AFS2
Bit 1
-
AFS1
Bit 0
-
AFS0
Control Function
Reserved
FIX_2 PLL Control
3V66/PCI Freq
Source Select
Async Rom SEL_2
Async Rom SEL_1
Async Rom SEL_0
Async Divider
SEL_1
Async Divider
SEL_0
Type
RW
RW
RW
RW
RW
RW
RW
RW
Type
RW
RW
RW
RW
RW
RW
RW
RW
Type
RW
RW
RW
RW
RW
RW
RW
RW
0
Disable
Disable
-
-
Disable
Disable
Disable
Disable
1
Enable
Enable
-
-
Enable
Enable
Enable
Enable
0
Disable
Disable
-
Disable
-
Disable
Disable
Disable
1
Enable
Enable
-
Enable
-
Enable
Enable
Enable
0
-
OFF
CPU_PLL
Sync
1
-
ON
FIX_PLL
Async
See Table 3: Async
3V66/PCI Frequency
Selection Table
PWD
1
1
0
1
1
1
1
1
PWD
1
1
1
1
1
1
1
1
PWD
0
1
0
0
0
0
0
1
0690D—05/14/04
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