1336—07/21/08

ICS9UMS9610

PC MAIN CLOCK

3

Advance Information

Pin Description (continued)

PIN #

PIN NAME

TYPE

DESCRIPTION

Logic Level

(V)

Input Level

Tolerance (V)

25

GNDSRC

GND Ground pin for the SRC outputs

0

N/A

26

SRCC0_LPR

OUT

Complementary clock of differential 0.8V push-pull SRC output with

integrated 33ohm series resistor. No 50ohm resistor to GND needed.

0.8

N/A

27

SRCT0_LPR

OUT

True clock of differential 0.8V push-pull SRC output with integrated 33ohm

series resistor. No 50ohm resistor to GND needed.

0.8

N/A

28

*CR#1_1.5

IN

1.5V Clock request for SRC1, 0 = enable, 1 = disable

1.5

1.5

29

VDDCORE_1.5

PWR 1.5V power for the PLL core

1.5

1.5

30

VDDIO_1.5

PWR Power supply for low power differential outputs, nominal 1.5V.

1.5

1.5

31

SRCC1_LPR

OUT

Complementary clock of differential 0.8V push-pull SRC output with

integrated 33ohm series resistor. No 50ohm resistor to GND needed.

0.8

N/A

32

SRCT1_LPR

OUT

True clock of differential 0.8V push-pull SRC output with integrated 33ohm

series resistor. No 50ohm resistor to GND needed.

0.8

N/A

33

GNDSRC

GND Ground pin for the SRC outputs

0

N/A

34

SRCC2_LPR

OUT

Complementary clock of differential 0.8V push-pull SRC output with

integrated 33ohm series resistor. No 50ohm resistor to GND needed.

0.8

N/A

35

SRCT2_LPR

OUT

True clock of differential 0.8V push-pull SRC output with integrated 33ohm

series resistor. No 50ohm resistor to GND needed.

0.8

N/A

36

*CR#2_1.5

IN

1.5V Clock request for SRC2, 0 = enable, 1 = disable

1.5

1.5

37

FSB_L_1.5

IN

Low threshold input for CPU frequency selection. Refer to input electrical

characteristics for Vil_FS and Vih_FS values. 1.5V Max input voltage.

1.5

1.5

38

CPUC2_LPR

OUT

Complementary clock of differential pair 0.8V push-pull CPU outputs with

integrated 33ohm series resistor. No 50 ohm resistor to GND needed.

0.8

N/A

39

CPUT2_LPR

OUT

True clock of differential pair 0.8V push-pull CPU outputs with integrated

33ohm series resistor. No 50 ohm resistor to GND needed.

0.8

N/A

40

GNDCPU

GND Ground pin for the CPU outputs

0

N/A

41

VDDIO_1.5

PWR Power supply for low power differential outputs, nominal 1.5V.

1.5

1.5

42

VDDCORE_1.5

PWR 1.5V power for the PLL core

1.5

1.5

43

CPUC1_LPR

OUT

Complementary clock of differential pair 0.8V push-pull CPU outputs with

integrated 33ohm series resistor. No 50 ohm resistor to GND needed.

0.8

N/A

44

CPUT1_LPR

OUT

True clock of differential pair 0.8V push-pull CPU outputs with integrated

33ohm series resistor. No 50 ohm resistor to GND needed.

0.8

N/A

45

GNDCPU

GND Ground pin for the CPU outputs

0

N/A

46

VDDIO_1.5

PWR Power supply for low power differential outputs, nominal 1.5V.

1.5

1.5

47

CPUC0_LPR

OUT

Complementary clock of differential pair 0.8V push-pull CPU outputs with

integrated 33ohm series resistor. No 50 ohm resistor to GND needed.

0.8

N/A

48

CPUT0_LPR

OUT

True clock of differential pair 0.8V push-pull CPU outputs with integrated

33ohm series resistor. No 50 ohm resistor to GND needed.

0.8

N/A