ICS950818

BYTE

Affected Pin

Control Function

Type

Bit Control

0

Pin #

Name

0

1

PWD

Bit7

-

Spread Enabled

Spread Spectrum Control

RW

OFF

ON

0

Power down mode output level

Bit 6

-

CPUCLKT(1 :0)

0= CPU driven in power down

RW

x2 IREF

Hi-Z

0

1= undriven

Bit 5

31

3V66 1NCH CLK

VCH/66.66 Select

RW

66.66

48.00

0

Bit4

44

CPU STOP#

Reflects value of pin

R

Stop

Active

X

Bit3

30

PCI_STOP#

Reflects value of pin at power up.

RW

Stop

Active

X

Also can be set.

Bit2

-

-

(Reserved)

R

-

-

X

Bit 1

46

FS1

Freauencv Selection

R

-

-

X

Bit 0

36

FS0

Freauencv Selection

R

-

-

X

Note: For PCI_STOP# function, refer to table2.

BYTE

Affected Pin

Control Function

Type

Bit Control

1

Pin #

Name

0

1

PWD

Bit7

-

-

(Reserved)

R

-

-

X

CPU_Stop mode output level

Bit 6

-

CPUCLKT(1 :0)

0= CPU driven when stopped

RW x2 IREF Hi-Z

0

1 = undriven

Bit 5

39,38

CPUCLKT1 ,CPUCLKC1

Allow control of output with

RW

Not

Freerun

0

(see note)

assertion of CPU STOP#.

Freerun

Bit4

43,42

CPUCLKT0,CPUCLKC0

Allow control of output with

RW

Not

Freerun

0

(see note)

assertion of CPU STOP#.

Freerun

Bit3

-

-

(Reserved)

R

-

-

X

Bit2

39,38

CPUCLKT1 , CPUCLKC1

Output control

RW Disable Enable

1

Bit 1

43,42

CPUCLKT0, CPUCLKC0

Output control

RW Disable Enable

1

Bit 0

-

-

(Reserved)

R

-

-

X

Note: CPUCLK(1 :0) can be turned on/off by CPU_STOP#. Refer to table3.

BYTE

Affected Pin

Control Function

Type

Bit Control

2

Pin #

Name

0

1

PWD

Bit7

47

REF

1X or 0.5X Strength control

RW

1X

0.5X

0

Bit 6

14

PCICLK5

Output control

RW Disable Enable

1

Bit 5

13

PCICLK4

Output control

RW Disable Enable

1

Bit4

12

*PCICLK3

Output control

RW Disable Enable

1

Bit3

-

-

Reserved

X

-

-

1

Bit2

10

*PCICLK2

Output control

RW

Disable

Enable

1

Bit 1

9

PCICLK1

Output control

RW

Disable

Enable

1

Bit 0

8

PCICLK0

Output control

RW

Disable

Enable

1

Note: PCICLK(5 :0) can be turned on/off by PCI_STOP#. Refer to table2.

0825F-11/19/03

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