1681C—08/26/10

9FG430

Four Output Differential Frequency Generator for PCIe Gen3 and QPI

13

SMBus Table: Frequency Select Readback Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

(FS3)

State of pin 17

R

Pin 17

Bit 6

State of pin 6

R

Pin 6

Bit 5

State of pin 24

R

Pin 24

Bit 4

State of pin 25

R

Pin 25

Bit 3

State of pin 26

R

Off

On

Pin 16

Bit 2

0

Bit 1

0

Bit 0

0

Notes:

1. These bits reflect the state of the corresponding pins, regardless of whether software

programming is enabled or not.

SMBus Table: Vendor & Revision ID Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

RID3

R

-

-

0

Bit 6

RID2

R

-

-

0

Bit 5

RID1

R

-

-

0

Bit 4

RID0

R

-

-

0

Bit 3

VID3

R

-

-

0

Bit 2

VID2

R

-

-

0

Bit 1

VID1

R

-

-

0

Bit 0

VID0

R

-

-

1

SMBus Table: DEVICE ID

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

DID7

R

-

-

0

Bit 6

DID6

R

-

-

1

Bit 5

DID5

R

-

-

0

Bit 4

DID4

R

-

-

0

Bit 3

DID3

R

-

-

0

Bit 2

DID2

R

-

-

0

Bit 1

DID1

R

-

-

1

Bit 0

DID0

R

-

-

1

SMBus Table: Byte Count Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

BC7

RW

-

-

0

Bit 6

BC6

RW

-

-

0

Bit 5

BC5

RW

-

-

0

Bit 4

BC4

RW

-

-

0

Bit 3

BC3

RW

-

-

0

Bit 2

BC2

RW

-

-

1

Bit 1

BC1

RW

-

-

1

Bit 0

BC0

RW

-

-

1

Reserved

Reserved

Reserved

Device ID = 43 hex

Byte 3

6

27

45

44

See Frequency Selection Table,

Page 1

-

16

VENDOR ID

-

-

-

-

Byte 4

-

REVISION ID

-

-

-

-

-

-

-

Byte 5

-

-

-

-

-

-

Byte 6

Writing to this register will

configure how many bytes will

be read back, default is 07 = 7

bytes.

-

-

-

-

-