W83176R-400/W83176G-400

CURRENT MODE DIFFERENTIAL BUFFER FOR PCI EXPRESS AND SATA

- 4 -

6.1 Register 0: Control Register (Default: 07h)

BIT

NAME

PWD

DESCRIPTION

7

PD_DM

0

PD# Drive mode, 0:driven, 1:Hi-Z

6

SRC_ST_DM

0

SRC_STOP Drive mode, 0:driven, 1:Hi-Z

5

SEL_SRCDIV

0

0:control by pin, 1:control by I2C

4

SEL_NORMAL

0

0:control by pin, 1:control by I2C

3

SEL_PLLBW

0

0:control by pin, 1:control by I2C

2

PLL_BW_ ADJ

1

0:High BW, 1:Low BW

1

NORMAL#/PLL

1

0:Normal buffer, 1:PLL mode

0

SRC_DIV#

1

0:Divided by 2 mode, 1:Normal (output=input)

6.2 Register 1: Control Register (Default: FFh)

BIT

NAME

PWD

DESCRIPTION

7

Reserved

1

Reserved

6

DIF6_EN

1

0:Disabled (Hi-Z), 1:Enable

5

DIF5_EN

1

0:Disabled (Hi-Z), 1:Enable

4

Reserved

1

Reserved

3

Reserved

1

Reserved

2

DIF2_EN

1

0:Disabled (Hi-Z), 1:Enable

1

DIF1_EN

1

0:Disabled (Hi-Z), 1:Enable

0

Reserved

1

Reserved

6.3 Register 2: Control Register (Default: 00h)

BIT

NAME

PWD

DESCRIPTION

7

Reserved

0

Reserved

6

DIF6STOP_EN

0

0:Free-run, 1:Stoppable

5

DIF5STOP_EN

0

0:Free-run, 1:Stoppable

4

Reserved

0

Reserved

3

Reserved

0

Reserved

2

DIF2STOP_EN

0

0:Free-run, 1:Stoppable

1

DIF1STOP_EN

0

0:Free-run, 1:Stoppable

0

Reserved

0

Reserved