ICS9LPRS462

Low Power Clock for ATI RS/RD600 series chipsets for AMD CPUs

IDTTM/ICSTM

Low Power Clock for ATI RS/RD600 series chipsets for AMD CPUs

1378A—04/07/08

3

Pin Description (Continued)

PIN #

PIN NAME

TYPE

DESCRIPTION

33

*CLKREQC#

IN

Programmable Clock Request pin for SRC/ATIG/SB_SRC outputs. If output is selected

for control, then that output is controlled as follows:

0 = Enabled, 1 = Tri-state

34

ATIG2C_LPR

OUT

Complementary clock of low-power differential push-pull PCI-Express pair with

integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

35

ATIG2T_LPR

OUT

True clock of low-power differential push-pull PCI-Express pair with integrated 33 ohm

series resistor. (no 50ohm shunt resistor to GND needed)

36

ATIG1C_LPR

OUT

Complementary clock of low-power differential push-pull PCI-Express pair with

integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

37

ATIG1T_LPR

OUT

True clock of low-power differential push-pull PCI-Express pair with integrated 33 ohm

series resistor. (no 50ohm shunt resistor to GND needed)

38

GNDATIG

GND

Ground pin for the ATIG outputs

39

VDDATIG

PWR

Power supply for ATIG core, nominal 3.3V

40

ATIG0C_LPR

OUT

Complementary clock of low-power differential push-pull PCI-Express pair with

integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

41

ATIG0T_LPR

OUT

True clock of low-power differential push-pull PCI-Express pair with integrated 33 ohm

series resistor. (no 50ohm shunt resistor to GND needed)

42

SRC1C_LPR

OUT

Complement clock of low power differential SRC clock pair with integrated 33 ohm

series resistor. (no 50ohm shunt resistor to GND needed)

43

SRC1T_LPR

OUT

True clock of low power differential SRC clock pair with integrated 33 ohm series

resistor. (no 50ohm shunt resistor to GND needed)

44

VDDSRC

PWR

Supply for SRC, 3.3V nominal

45

GNDSRC

GND

Ground pin for the SRC outputs

46

SRC0C_LPR

OUT

Complement clock of low power differential SRC clock pair with integrated 33 ohm

series resistor. (no 50ohm shunt resistor to GND needed)

47

SRC0T_LPR

OUT

True clock of low power differential SRC clock pair with integrated 33 ohm series

resistor. (no 50ohm shunt resistor to GND needed)

48

NC

NC

No Connect

49

GNDA

GND

Ground for the Analog Core

50

VDDA

PWR

3.3V Power for the Analog Core

51

CPUKG1C_LPR

OUT

Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock

with integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

52

CPUKG1T_LPR

OUT

True signal of low-power differential push-pull AMD K8 "Greyhound" clock with

integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

53

GNDCPU

GND

Ground pin for the CPU outputs

54

VDDCPU

PWR

Supply for CPU, 3.3V nominal

55

CPUKG0C_LPR

OUT

Complementary signal of low-power differential push-pull AMD K8 "Greyhound" clock

with integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

56

CPUKG0T_LPR

OUT

True signal of low-power differential push-pull AMD K8 "Greyhound" clock with

integrated 33 ohm series resistor. (no 50ohm shunt resistor to GND needed)

57

*CLKREQA#

IN

Programmable Clock Request pin for SRC/ATIG/SB_SRC outputs. If output is selected

for control, then that output is controlled as follows:

0 = Enabled, 1 = Tri-state

58

GNDHTT

PWR

Ground pin for the HTT outputs

59

HTTCLK0

OUT

3.3V single ended 66MHz hyper transport clock

60

VDDHTT

PWR

Supply for HTT clocks, nominal 3.3V.

61

**PD

IN

Enter /Exit Power Down.

1 = Power Down, 0 = normal operation.

62

FS2/REF2

I/O

Frequency select latch input pin/ 3.3V 14.318MHz reference clock

63

FS1/REF1

I/O

Frequency select latch input pin/ 3.3V 14.318MHz reference clock

64

FS0/REF0

I/O

Frequency select latch input pin/ 3.3V 14.318MHz reference clock