IDT® Nineteen Output Differential Buffer for PCIe Gen3

9DB1933

Nineteen Output Differential Buffer for PCIe Gen3

13

1676A—07/12/10

SMBusTable: Reserved Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

R

1

Bit 6

R

1

Bit 5

R

1

Bit 4

R

1

Bit 3

R

1

Bit 2

R

0

Bit 1

R

1

Bit 0

R

1

SMBusTable: Output Control Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

DIF_7

Output Control

RW

Hi-Z

Enable

1

Bit 6

DIF_6

Output Control

RW

Hi-Z

Enable

1

Bit 5

DIF_5

Output Control

RW

Hi-Z

Enable

1

Bit 4

DIF_4

Output Control

RW

Hi-Z

Enable

1

Bit 3

DIF_3

Output Control

RW

Hi-Z

Enable

1

Bit 2

DIF_2

Output Control

RW

Hi-Z

Enable

1

Bit 1

DIF_1

Output Control

RW

Hi-Z

Enable

1

Bit 0

DIF_0

Output Control

RW

Hi-Z

Enable

1

SMBusTable: Output and PLL BW Control Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

RW

High BW

Low BW

1

Bit 6

RW

Bypass

PLL

1

Bit 5

DIF_13

Output Control

RW

Hi-Z

Enable

1

Bit 4

DIF_12

Output Control

RW

Hi-Z

Enable

1

Bit 3

DIF_11

Output Control

RW

Hi-Z

Enable

1

Bit 2

DIF_10

Output Control

RW

Hi-Z

Enable

1

Bit 1

DIF_9

Output Control

RW

Hi-Z

Enable

1

Bit 0

DIF_8

Output Control

RW

Hi-Z

Enable

1

Note: Bit 7 is wired OR to the HIGH_BW# input, any 0 selects High BW

Note: Bit 6 is wired OR to the SMB_A2_PLLBYP# input, any 0 selects Fanout Bypass mode

SMBusTable: Output Enable Readback Register

Pin #

Name

Control Function

Type

0

1

Default

Bit 7

R

X

Bit 6

R

X

Bit 5

R

X

Bit 4

R

X

Bit 3

R

X

Bit 2

R

X

Bit 1

R

X

Bit 0

R

X

72

see note

PLL_BW# adjust

see note

BYPASS# test mode / PLL

Byte 3

8

Byte 1

-

-

-

-

Byte 0

-

-

Reserved

-

-

Reserved

Reserved

Readback

Readback - OE9# Input

Readback - OE8# Input

Readback

Readback

Readback - OE7# Input

Readback

Readback - OE_01234# Input

Readback

Readback - OE5# Input

Readback - OE6# Input

Readback

Byte 2

Reserved

Readback - SMB_A2_PLLBYP# In

Readback

Readback - HIGH_BW# In

Readback

Reserved

Reserved

Reserved

Reserved