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ICS951413 Fiches technique(PDF) 13 Page - Integrated Circuit Systems

No de pièce ICS951413
Description  Programmable System Clock Chip for ATI RS400 P4-based Systems
PDF  23 Pages
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Fabricant  ICST [Integrated Circuit Systems]
Site Internet  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS951413 Fiches technique(HTML) 13 Page - Integrated Circuit Systems

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13
Integrated
Circuit
Systems, Inc.
ICS951413
0929C—03/07/05
SMBus Table: CPU Spread Spectrum Control Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
Reserved
Reserved
R
-
-
0
Bit 6
SSP14
RW
X
Bit 5
SSP13
RW
X
Bit 4
SSP12
RW
X
Bit 3
SSP11
RW
X
Bit 2
SSP10
RW
X
Bit 1
SSP9
RW
X
Bit 0
SSP8
RW
X
SMBus Table: SRC Frequency Control Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
N Div8
N Divider Prog bit 8
RW
X
Bit 6
N Div9
N Divider Prog bit 9
RW
X
Bit 5
M Div5
RW
X
Bit 4
M Div4
RW
X
Bit 3
M Div3
RW
X
Bit 2
M Div2
RW
X
Bit 1
M Div1
RW
X
Bit 0
M Div0
RW
X
SMBus Table: SRC Frequency Control Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
N Div7
RW
X
Bit 6
N Div6
RW
X
Bit 5
N Div5
RW
X
Bit 4
N Div4
RW
X
Bit 3
N Div3
RW
X
Bit 2
N Div2
RW
X
Bit 1
N Div1
RW
X
Bit 0
N Div0
RW
X
SMBus Table: SRC Spread Spectrum Control Register
Pin #
Name
Control Function
Type0
1
PWD
Bit 7
SSP7
RW
X
Bit 6
SSP6
RW
X
Bit 5
SSP5
RW
X
Bit 4
SSP4
RW
X
Bit 3
SSP3
RW
X
Bit 2
SSP2
RW
X
Bit 1
SSP1
RW
X
Bit 0
SSP0
RW
X
Spread Spectrum
Programming bit(14:8)
These Spread Spectrum
bits in Byte 13 and 14 will
program the spread
pecentage of CPU
The decimal
representation of M and
N Divier in Byte 15 and
16 will configure the SRC
VCO frequency. Default
at power up = latch-in or
Byte 0 Rom table. VCO
Frequency = 14.318 x
These Spread Spectrum
bits in Byte 17 and 18 will
program the spread
pecentage of SRC
Byte 14
-
-
-
-
-
-
-
-
Byte 15
-
-
-
M Divider Programming
bits
-
-
-
-
-
Byte 16
-
N Divider Programming
b(7:0)
The decimal
representation of M and
N Divier in Byte 15 and
16 will configure the SRC
VCO frequency. Default
at power up = latch-in or
Byte 0 Rom table. VCO
Frequency = 14.318 x
-
-
-
-
-
-
-
Byte 17
-
Spread Spectrum
Programming b(7:0)
-
-
-
-
-
-
-



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