9

Integrated

Circuit

Systems, Inc.

ICS952906A

1236A—08/06/07

I

Control

Function

Bit 7

FS Source

Frequency H/W IIC

Select

RW

0

Bit 6

FS6

Freq Select Bit 6

RW

0

Bit 5

FS5

Freq Select Bit 5

RW

0

Bit 4

FS4

Freq Select Bit 4

RW

0

Bit 3

FS3

Freq Select Bit 3

RW

0

Bit 2

FS2

Freq Select Bit 2

RW

0

Bit 1

FS1

Freq Select Bit 1

RW

0

Bit 0

FS0

Freq Select Bit 0

RW

0

I

Control

Function

Bit 7

SS1

Spread Select 1**

RW

0

Bit 6

SS0

Spread Select 0**

RW

1

Bit 5

SS_EN

Spread Enable Control

RW

1

Bit 4

WDS_EN

WD Soft Reset Enable

RW

0

Bit 3

Reserved

Reserved

RW

1

Bit 2

CPUCLKT/C_ITP,

CPU1T/C, CPU0T/C

Output Control

RW

1

Bit 1

CPUCLKT/C_1

Output Control

RW

1

Bit 0

CPUCLKT/C_0

Output Control

RW

1

I

Control

Function

Bit 7

25MHz_0

Output Control

RW

1

Bit 6

25MHz_1

Output Control

RW

1

Bit 5

CPUT Stop Mode

0: CPUT Driven during

PD#; 1: Tri-stated

RW

0

Bit 4

Reserved

Reserved

RW

1

Bit 3

3V66_1

Output Control

RW

1

Bit 2

Reserved

Reserved

RW

1

Bit 1

CPUCLKT/C_1

Output Stop Control

RW

1

Bit 0

CPUCLKT/C_0

Output Stop Control

RW

1

I

Control

Function

Bit 7

ASEL1

3V66/PCI Freq Select

RW

0

Bit 6

PCICLK6

Output Control

RW

1

Bit 5

PCICLK5

Output Control

RW

1

Bit 4

PCICLK4

Output Control

RW

1

Bit 3

PCICLK3

Output Control

RW

1

Bit 2

PCICLK2

Output Control

RW

1

Bit 1

PCICLK1

Output Control

RW

1

Bit 0

PCICLK0

Output Control

RW

1

Disable

Enable

See Table 5: Async AGP/PCI Freq Table

Disable

Enable

Disable

Enable

Disable

Enable

Disable

Enable

Disable

Enable

Free Run

Stoppable

Disable

Enable

--

Free Run

Stoppable

Disable

Enable

Disable

Enable

--

Disable

Enable

Driven

Hi-Z

Disable

Enable

Disable

Disable

Enable

Enable

ON

OFF

--

01 = 0.25%

Reserved

PWD

-

Byte 3

Pin #

Name

Type

0

1

36

35

26

-

42,41

39, 38

20

Type

PWD

39, 38

Byte 2

Pin #

Name

0

1

** Spread program m ing only applies for ROM table entries 0001000 to 0001011 and 0010000 to 0010111

-

-

45, 44

42,41

ON

OFF

-

PWD

-

-

Byte 1

Pin #

Name

Type

00 = 0.20%

10 = 0.35%

-

-

See Table 1: QuadRom Frequency

Selection Table

01

PWD

-

Byte 0

Pin #

Name

Type

Latch Inputs

IIC

01

-

-

-

-

-

19

16

15

14

13

12

-

-