AMD-761 datasheet(69/264 Pages) AMD

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Chapter 2

AMD-761™ System Controller Programmer’s Interface

24081D—February 2002

AMD-761™ System Controller Software/BIOS Design Guide

Preliminary Information

Bit Definitions

DRAM Mode/Status (Dev0:F0:0x58)

Bit

Name

Function

Clk_Dis5

Clock Disable

This bit controls the DDR CLKOUT5/CLKOUT5# differential clock pair:

0 = Clock pair enabled

1 = Clock pair disabled (three-stated)

Note:

This bit is meant to disable the clock pair when it is not connected to anything.

This bit should not be used for memory sizing or power management uses.

Clk_Dis4

Clock Disable

This bit controls the DDR CLKOUT4/CLKOUT4# differential clock pair.

0 = Clock pair enabled

1 = Clock pair disabled (three-stated)

Note:

This bit is meant to disable the clock pair when it is not connected to anything.

This bit should not be used for memory sizing or power management uses.

Clk_Dis3

Clock Disable

This bit controls the DDR CLKOUT3/CLKOUT3# differential clock pair.

0 = Clock pair enabled

1 = Clock pair disabled (three-stated)

Note:

This bit is meant to disable the clock pair when it is not connected to anything.

This bit should not be used for memory sizing or power management uses.

Clk_Dis2

Clock Disable

This bit controls the DDR CLKOUT2/CLKOUT2# differential clock pair.

0 = Clock pair enabled

1 = Clock pair disabled (three-stated)

Note:

This bit is meant to disable the clock pair when it is not connected to anything.

This bit should not be used for memory sizing or power management uses.

Clk_Dis1

Clock Disable

This bit controls the DDR CLKOUT1/CLKOUT1# differential clock pair.

0 = Clock pair enabled

1 = Clock pair disabled (three-stated)

Note:

This bit is meant to disable the clock pair when it is not connected to anything.

This bit should not be used for memory sizing or power management uses.

Clk_Dis0

Clock Disable

This bit controls the DDR CLKOUT0/CLKOUT0# differential clock pair.

0 = Clock pair enabled

1 = Clock pair disabled (three-stated)

Note:

This bit is meant to disable the clock pair when it is not connected to anything.

This bit should not be used for memory sizing or power management uses.

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