ICS9LPRS464 查看數據表（PDF） - Integrated Device Technology

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ICS9LPRS464

System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

Integrated Device Technology 

ICS9LPRS464

System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUss

Table 4: CPU Divider Ratios

B19b(7:4)

Divider (3:2)

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)

Divider (3:2)

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)

Divider (3:2)

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

CPU Clock

Common Recommendations for Differential Routing

L1 length, Route as coupled 93 ohm trace.

L2 length, Route as coupled 93 ohm trace.

Dimension or Value

0.5 max

Contact AMD

Unit Figure

inch 1

inch 1

Figure 1 CPU clock routing.

3900pF

+/-10%

Low Power Output Buffer

w/integrated series resistor

3900pF

+/-10%

93Ω +/-10% DIFF

L2

L2

IDTTM/ICSTM System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

12

93Ω +/-10% DIFF

L1

169Ω +/-10%

L1

AMD "Greyhound"

CPU input

1377A—04/07/08

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