ICS952703 Datasheet, PDF (9/17 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for K7 System

Integrated
Circuit
Systems, Inc.
ICS952703
Preliminary Product Preview
I²C Table: VCO Frequency Control Register
Byte 11
Pin #
Name
Control Function Type
0
1
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
N Div8
N Div9
M Div5
M Div4
M Div3
M Div2
M Div1
M Div0
N Divider Prog bit 8 RW
N Divider Prog bit 9
RW _{The decimal representation of M and N}
RW _{Divier in Byte 11 and 12 will configure the}
RW VCO frequency. Default at power up =
M Divider Programming RW
latch-in or Byte 0 Rom table.
bits
RW ^{VCO Frequency = 14.318 x [NDiv(9:0)+8]}
/ [MDiv(5:0)+2]
RW
RW
PWD
X
X
X
X
X
X
X
X
I²C Table: VCO Frequency Control Register
Byte 12
Pin #
Name
Control Function Type
0
1
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
N Div7
N Div6
N Div5
N Div4
N Div3
N Div2
N Div1
N Div0
RW
RW
The decimal representation of M and N
RW _{Divier in Byte 11 and 12 will configure the}
N Divider Programming ^RW VCO frequency. Default at power up =
b(7:0)
RW
latch-in or Byte 0 Rom table.
RW ^{VCO Frequency = 14.318 x [NDiv(9:0)+8]}
RW
/ [MDiv(5:0)+2]
RW
PWD
X
X
X
X
X
X
X
X
I²C Table: Spread Spectrum Control Register
Byte 13
Pin #
Name
Control Function Type
0
1
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
SSP7
SSP6
SSP5
SSP4
SSP3
SSP2
SSP1
SSP0
Spread Spectrum
Programming b(7:0)
RW
RW
RW ^{These Spread Spectrum bits in Byte 13}
RW
and 14 will program the spread
pecentage. It is recommended to use
RW
ICS Spread % table for spread
RW
programming.
RW
RW
PWD
X
X
X
X
X
X
X
X
I²C Table: Spread Spectrum Control Register
Byte 14
Pin #
Name
Control Function Type
0
1
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Reserved
SSP14
SSP13
SSP12
SSP11
SSP10
SSP9
SSP8
Reserved
R
-
-
RW
RW These Spread Spectrum bits in Byte 13
Spread Spectrum ^RW
Programming b(14:8) ^RW
RW
RW
and 14 will program the spread
pecentage. It is recommended to use
ICS Spread % table for spread
programming.
RW
PWD
0
X
X
X
X
X
X
X
0813B—05/17/05
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