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ICS9LPRS464 Datasheet(PDF) 12 Page - Integrated Device Technology

Part # ICS9LPRS464
Description  System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs
PDF  23 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

ICS9LPRS464 Datasheet(HTML) 12 Page - Integrated Device Technology

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ICS9LPRS464
System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUss
IDTTM/ICSTM
System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs
1377A—04/07/08
Table 4: CPU Divider Ratios
B19b(7:4)
Bit
00
01
10
11
MSB
00
0000
2
0100
4
1000
8
1100
16
01
0001
3
0101
6
1001
12
1101
24
10
0010
5
0110
10
1010
20
1110
40
11
0011
15
0111
30
1011
60
1111
120
LSB
Address
Div
Address
Address
Div
Address
Div
Table 5: HTT Divider Ratios
B20b(3:0)
Bit
00
01
10
11
MSB
00
0000
4
0100
8
1000
16
1100
32
01
0001
3
0101
6
1001
12
1101
24
10
0010
5
0110
10
1010
20
1110
40
11
0011
15
0111
30
1011
60
1111
120
LSB
Address
Div
Address
Address
Div
Address
Div
Table 6: ATIG Divider Ratios
B19b(3:0)
Bit
00
01
10
11
MSB
00
0000
2
0100
4
1000
8
1100
16
01
0001
3
0101
6
1001
12
1101
24
10
0010
5
0110
10
1010
20
1110
40
11
0011
7
0111
14
1011
28
1111
56
LSB
Address
Div
Address
Address
Div
Address
Div
Divider (3:2)
Divider (3:2)
Divider (3:2)
CPU Clock
Common Recommendations for Differential Routing
Dimension or Value
Unit
Figure
0.5 max
inch
1
L1 length, Route as coupled 93 ohm trace.
L2 length, Route as coupled 93 ohm trace.
Contact AMD
inch
1
L2
L2
L1
L1
3900pF
+/-10%
Figure 1 CPU clock routing.
Low Power Output Buffer
w/integrated series resistor
AMD "Greyhound"
CPU input
3900pF
+/-10%
93Ω +/-10% DIFF
93Ω +/-10% DIFF
169Ω +/-10%



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