5

Integrated

Circuit

Systems, Inc.

ICS9LPR501

1118E—08/08/07

Pin Description (Continued)

Fully Integrated Regulator

Fully Integrated Regulator

Fully Integrated Regulator

Fully Integrated Regulator

Fully Integrated Regulator Connection for Desktop/Mobile Applications

ICS9LPR501

1.05V to 3.3V

(+/-5%)

NC

PIN 48

VDDCPU_IO, Pin 49

VDDSRC_IO Pin 45,36,26

VDDPLL3_IO, Pin 20

VDD96_IO, Pin 12

SRC_IO Decoupling

Network

PLL3_IO Decoupling

Network

CPU_IO Decoupling

Network

96_IO Decoupling

Network

PIN #

PIN NAME

TYPE

DESCRIPTION

49

VDDCPU_IO

PWR

Supply for CPU outputs. VDDCPU_IO is 1.05 to 3.3V with +/-5% tolerance

50

CPUC1_F

OUT

Complement clock of low power differenatial CPU clock pair. This clock will be free-running

during iAMT.

51

CPUT1_F

OUT

True clock of low power differential CPU clock pair. This clock will be free-running during iAMT.

52

GNDCPU

PWR

Ground Pin for CPU Outputs

53

CPUC0

OUT

Complement clock of low power differential CPU clock pair.

54

CPUT0

OUT

True clock of low power differential CPU clock pair.

55

VDDCPU

PWR

Power Supply 3.3V nominal.

56

CK_PWRGD/PD#

IN

Notifies CK505 to sample latched inputs, or iAMT entry/exit, or PWRDWN# mode

57

FSLB/TEST_MODE

IN

3.3V tolerant input for CPU frequency selection. Refer to input electrical characteristics for

Vil_FS and Vih_FS values. TEST_MODE is a real time input to select between Hi-Z and REF/N

divider mode while in test mode. Refer to Test Clarification Table.

58

GNDREF

PWR

Ground pin for crystal oscillator circuit

59

X2

OUT

Crystal output, nominally 14.318MHz.

60

X1

IN

Crystal input, Nominally 14.318MHz.

61

VDDREF

PWR

Power pin for the REF outputs, 3.3V nominal.

62

REF0/FSLC/TEST_SEL

I/O

3.3V 14.318MHz reference clock/3.3V tolerant low threshold input for CPU frequency selection.

Refer to input electrical characteristics for Vil_FS and Vih_FS values/ TEST_SEL: 3-level

latched input to enable test mode. Refer to Test Clarification Table.

63

SDATA

I/O

Data pin for SMBus circuitry, 5V tolerant.

64

SCLK

IN

Clock pin of SMBus circuitry, 5V tolerant.