ICS950703 Datasheet, PDF (11/24 Pages) Integrated Circuit Systems – PROGRAMMABLE TIMING CONTROL HUB FOR P4

Integrated
Circuit
Systems, Inc.
ICS950703
I²C Table: Frequency Select Register
Byte 0
Pin #
Name
Bit 7
-
FS Source
Bit 6
-
FS6
Bit 5
-
FS5
Bit 4
-
FS4
Bit 3
-
FS3
Bit 2
-
FS2
Bit 1
-
FS1
Bit 0
-
FS0
Control Function
Frequency H/W IIC
Select
Freq Select Bit 6
Freq Select Bit 5
Freq Select Bit 4
Freq Select Bit 3
Freq Select Bit 2
Freq Select Bit 1
Freq Selcet Bit 0
Type
RW
RW
RW
RW
RW
RW
RW
RW
I²C Table: Spreading, Device Behavior and Output Control Register
Byte 1
Pin #
Name
Control Function Type
Bit 7
-
SS1
Spread Select 1
RW
Bit 6
-
SS0
Spread Select 0
RW
Bit 5
-
SSEN
Spread Enable
Control
RW
Bit 4
-
Reserved
Reserved
RW
Bit 3
51/50
CPUT/C3
Output Control
RW
Bit 2
48/47
CPUT/C2
Output Control
RW
Bit 1
45/44
CPUT/C1
Output Control
RW
Bit 0
42/41
CPUT/C0
Output Control
RW
0
1
Latch
Inputs
IIC
See Table 1: Quad
Rom^TM Frequency
Selection Table
PWD
0
0
0
0
0
0
0
1
0
1
See Table 2: Spread
Spectrum Table
Disable Enable
-
Disable
Disable
Disable
Disable
-
Enable
Enable
Enable
Enable
PWD
0
0
0
0
1
1
1
1
Table2: Spread Spectrum Select
SS1
SS0
(Byte 1 bit 7)
(Byte 1 bit 6)
0
0
0
1
1
0
1
1
Spread %
0.35%
0.50%
0.70%
1.00%
Downspread
%
0.32%
0.45%
0.75%
1.00%
Note
Default
Spread 2
Spread 3
Spread 4
I²C Table: Output Control Register
Byte 2
Pin #
Name
Bit 7
18
PCICLK7
Bit 6
17
PCICLK6
Bit 5
15
PCICLK5
Bit 4
14
PCICLK4
Bit 3
12
PCICLK3
Bit 2
11
PCICLK2
Bit 1
9
PCICLK1
Bit 0
8
PCICLK0
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
PWD
1
1
1
1
1
1
1
1
0690D—05/14/04
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