3

Integrated

Circuit

Systems, Inc.

ICS9LPRS511

Advance Information

1137—09/05/08

Pin Description (Continued)

Pin#

Pin Name

Type Pin Description

33

PCIeC_LR5

OUT

Complement clock of 0.75V differential push-pull PCI_Express pair with integrated

33ohm series resistor

34

PCIeT_LR5

OUT

True clock of 0.75V differential push-pull PCI_Express pair with integrated 33ohm

series resistor

35

PCIeC_LR6

OUT

Complement clock of 0.75V differential push-pull PCI_Express pair with integrated

33ohm series resistor

36

PCIeT_LR6

OUT

True clock of 0.75V differential push-pull PCI_Express pair with integrated 33ohm

series resistor

37

GND

PWR Ground pin.

38

PCIeC_LR7

OUT

Complement clock of 0.75V differential push-pull PCI_Express pair with integrated

33ohm series resistor

39

PCIeT_LR7

OUT

True clock of 0.75V differential push-pull PCI_Express pair with integrated 33ohm

series resistor

40

PCIeC_LR8

OUT

Complement clock of 0.75V differential push-pull PCI_Express pair with integrated

33ohm series resistor

41

PCIeT_LR8

OUT

True clock of 0.75V differential push-pull PCI_Express pair with integrated 33ohm

series resistor

42

VDDA

PWR 3.3V power for the PLL core.

43

GNDA

PWR Ground pin for the PLL core.

44

VDDI/O

PWR Power supply for differential outputs

45

CPUC_LR1

OUT

Complementary clock of differential pair 0.75V push-pull CPU outputs with integrated

33ohm series resistor.

46

CPUT_LR1

OUT

True clock of differential pair 0.75V push-pull CPU outputs with integrated 33ohm

series resistor.

47

VDDCPU

PWR Supply for CPU clocks, 3.3V nominal

48

CPUC_LR0

OUT

Complementary clock of differential pair 0.75V push-pull CPU outputs with integrated

33ohm series resistor.

49

CPUT_LR0

OUT

True clock of differential pair 0.75V push-pull CPU outputs with integrated 33ohm

series resistor.

50

GND

PWR Ground pin.

51

SCLK

IN

Clock pin of SMBus circuitry, 5V tolerant.

52

SDATA

I/O

Data pin for SMBus circuitry, 5V tolerant.

53

VDDREF

PWR Ref, XTAL power supply, nominal 3.3V

54

X2

OUT

Crystal output, Nominally 14.318MHz

55

X1

IN

Crystal input, Nominally 14.318MHz.

56

GND

PWR Ground pin.

57

REF0_2x/FSLC

I/O

2x strength 14.318 MHz reference clock./ 3.3V tolerant input for CPU frequency

selection. Refer to input electrical characteristics for Vil_FS and Vih_FS values.

58

GND

PWR Ground pin.

59

SATACLKC_LR

OUT

Complement clock of 0.75V push-pull differential SATA pair with integrated 33ohm

series resistor.

60

SATACLKT_LR

OUT

True clock of 0.75V push-pull differential SATA pair with integrated 33ohm series

resistor.

61

VDDSATA

PWR Supply for SATA clocks, 3.3V nominal

62

VDD25Mhz

PWR Power supply for 25MHz clocks, 3.3V nominal.

63

GND

PWR Ground pin.

64

25Mhz_0F_2x/Freerun*

I/O

2x strength 25MHz clock output, 3.3V (free running by default) / Latch input to select if

25Mhz_0 is freerunning or stoppable on power up default. Freerun = 1, 25Mhz_0 is

free running, Freerun = 0, 25Mhz_0 is stoppable.