ICS9FG104E

FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA

IDT®

FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA

9

ICS9FG104E

REV D 102912

SMBus Table: Frequency Select Readback Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

SEL14M_25M#

1

(FS3)

State of pin 17

R

Pin 17

Bit 6

FS2

1

State of pin 6

R

Pin 6

Bit 5

FS1

1

State of pin 24

R

Pin 24

Bit 4

FS0

1

State of pin 25

R

Pin 25

Bit 3

SPREAD

1

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

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

SMBus Table: DEVICE ID

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

DID7

R

-

-

0

Bit 6

DID6

R

-

-

0

Bit 5

DID5

R

-

-

0

Bit 4

DID4

R

-

-

0

Bit 3

DID3

R

-

-

1

Bit 2

DID2

R

-

-

0

Bit 1

DID1

R

-

-

0

Bit 0

DID0

R

-

-

0

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

Rev E = 1000

Reserved

Reserved

Reserved

Device ID = 08 hex

6

27

Byte 3

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.