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ICS951901 Datasheet(PDF) 3 Page - Integrated Circuit Systems

Part # ICS951901
Description  Programmable Frequency Generator & Integrated Buffers for Pentium III Processor
PDF  19 Pages
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Manufacturer  ICST [Integrated Circuit Systems]
Direct Link  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS951901 Datasheet(HTML) 3 Page - Integrated Circuit Systems

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3
ICS951901
0670B—07/15/04
Byte0: Functionality and Frequency Select Register (default = 0)
Serial Configuration Command Bitmap
Note: PWD = Power-Up Default
Note1:
Default at power-up will be for latched logic inputs to define frequency, as displayed by Bit 3.
I
2C is a trademark of Philips Corporation
FS3
FS2
FS1
FS0
CPU
SDRAM
PCI
AGP1
AGP0
Spread %
PWD
Bit2
Bit7
Bit6
Bit5
Bit4
MHz
MHz
MHz
SEL=1
SEL=0
00000
66.67
66.67
33.33
66.67
64
± 0.35% center spread
00001
66.67
100.00
33.33
66.67
64
± 0.35% center spread
00010
66.67
133.34
33.33
66.67
64
± 0.35% center spread
00011
75.00
75.00
37.50
75.00
64
± 0.35% center spread
00100
83.31
83.31
33.32
66.64
64
± 0.35% center spread
00101
90.00
90.00
30.00
60.00
64
± 0.35% center spread
00110
95.00
95.00
31.67
63.33
64
± 0.35% center spread
00111
100.00
66.67
33.33
66.67
64
± 0.35% center spread
01000
100.00
100.00
33.33
66.67
64
± 0.35% center spread
01001
100.00
133.34
33.33
66.67
64
± 0.35% center spread
01010
105.00
105.00
35.00
70.00
64
± 0.35% center spread
01011
112.00
112.00
33.60
67.20
64
± 0.35% center spread
01100
117.99
117.99
35.40
70.80
64
± 0.35% center spread
01101
124.09
124.09
31.02
62.05
64
± 0.35% center spread
Bit 2
01110
133.34
100.00
33.33
66.67
64
± 0.35% center spread
00000
Bit 7:4
01111
133.34
133.34
33.33
66.67
64
± 0.35% center spread
Note1
10000
75.00
100.00
37.50
75.00
64
± 0.35% center spread
10001
75.00
112.50
32.14
64.29
64
± 0.35% center spread
10010
75.00
150.00
32.14
64.29
64
± 0.35% center spread
10011
83.31
111.07
33.32
66.64
64
± 0.35% center spread
10100
83.32
166.65
31.25
62.49
64
± 0.35% center spread
10101
90.00
60.00
30.00
60.00
64
± 0.35% center spread
10110
90.00
120.00
30.00
60.00
64
± 0.35% center spread
10111
95.00
63.33
31.67
63.33
64
± 0.35% center spread
11000
95.00
126.66
31.67
63.33
64
± 0.35% center spread
11001
105.00
70.00
35.00
70.00
64
± 0.35% center spread
11010
105.00
140.00
35.00
70.00
64
± 0.35% center spread
11011
112.00
84.00
33.60
67.20
64
± 0.35% center spread
11100
117.99
88.49
35.40
70.80
64
± 0.35% center spread
11101
124.09
93.07
31.02
62.05
64
± 0.35% center spread
11110
129.99
97.49
32.50
64.99
64
± 0.35% center spread
11111
140.00
105.00
35.00
70.00
64
± 0.35% center spread
Bit 3
0 - Frequency is selected by hardware select, Latched inputs
0
1 - Frequency is selected by Bit, 2 7:4
Bit 1
0 - Normal
1
1 - Spread Spectrum Enabled
Bit 0
0 - Running
0
1 - Tristate all outputs
Bit
Description



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