13

Integrated

Circuit

Systems, Inc.

ICS954309

1044A—02/20/07

SMBus Table: Stop and Output Control Register

Pin #

Name

Control Function

Type

0

1

PWD

Bit 7

X

Bit 6

DOT96MHz

PD Drive Mode

RW

Driven

Hi-Z

0

Bit 5

0

Bit 4

0

Bit 3

PCICLK_F0 Stop EN

Allow assertion of PCI_STOP# or

setting of PCI_STOP control bit

in SMBus register to stop

PCICLK_F output

RW

Free-Running

Stoppable

0

Bit 2

CPUCLK2 Stop

RW

Free-Running

Stoppable

0

Bit 1

CPUCLK1 Stop

RW

Free-Running

Stoppable

0

Bit 0

CPUCLK0 Stop

RW

Free-Running

Stoppable

0

SMBus Table: CPU and SRC Stop and Power Down Drive Mode Control Register

Pin #

Name

Control Function

Type

0

1

PWD

Bit 7

0

Bit 6

CPUCLK2 STOP Drive Mode

RW

Driven

Hi-Z

0

Bit 5

CPUCLK1 STOP Drive Mode

RW

Driven

Hi-Z

0

Bit 4

CPUCLK0 STOP Drive Mode

RW

Driven

Hi-Z

0

Bit 3

SRCCLK PD Drive Mode

Driven in Powerdown (PD)

RW

Driven

Hi-Z

0

Bit 2

CPUCLK2 PD Drive Mode

RW

Driven

Hi-Z

0

Bit 1

CPUCLK1 PD Drive Mode

RW

Driven

Hi-Z

0

Bit 0

CPUCLK0 PDDrive Mode

RW

Driven

Hi-Z

0

SMBus Table: Test Mode Control and FS Readback Register

Pin #

Name

Control Function

Type

0

1

PWD

Bit 7

Test Mode Selection

Test Mode Selection

RW

Hi-Z

REF/N

0

Bit 6

Test Clock Mode Entry

Test Mode Entry

RW

Normal Operation

Test Mode

0

Bit 5

0

Bit 4

REFCLK Strength

Output Drive Strength

RW

1X

2X

1

Bit 3

PCI_STOP# Configure

Stops all PCI clocks except

PCICLK_F0 if it is set to free-

running.

RW

Stopped

Normal Operation

1

Bit 2

FS_C

FS_C Readback

R

-

-

Latched

Bit 1

FS_B

FS_B Readback

R

-

-

Latched

Bit 0

FS_A

FS_A Readback

R

-

-

Latched

SMBus Table: Vendor & Revision ID Register

Pin #

Name

Control Function

Type

0

1PWD

Bit 7

RID3

R

-

-

X

Bit 6

RID2

R

-

-

X

Bit 5

RID1

R

-

-

X

Bit 4

RID0

R

-

-

X

Bit 3

VID3

R

-

-

0

Bit 2

VID2

R

-

-

0

Bit 1

VID1

R

-

-

0

Bit 0

VID0

R

-

-

1

Driven in CPU_STOP#

Driven in Powerdown (PD)

Allow assertion of CPU_STOP#

to stop CPUCLK outputs

Byte 5

Byte 6

Byte 4

-

-

-

Byte 7

-

-

-

-

-

-

-

-

-

Reserved

Reserved

Reserved

Reserved

Reserved

-

VENDOR ID

-

-

REVISION ID