DM3730 DDR Bit Swapping

Paul Merana

Other Parts Discussed in Thread: DM3730

Hello,

I need to confirm that we are allowed to swap data bits within a given data byte lane on the DM3730 to assist on breakout. (ie swapping d0 with d7). Additionally are we also allowed to swap entire bytes for example (d7:0 & dm0 & dqs0) with (d15:9 & dmn1 & dqs1)?

Thank you

over 13 years ago

0 TimHarron over 13 years ago

TI__Mastermind 18130 points

Hi Paul,

As long as you swap only within a byte line you are OK. Swapping outside a byte lane will result in issues.

0 Paul Merana over 13 years ago in reply to TimHarron

Prodigy 110 points

Hi Tim,

Are we allowed to swap the entire byte lane if necessary?

Thank you

0 TimHarron over 13 years ago in reply to Paul Merana

TI__Mastermind 18130 points

Paul,

Neither the memory nor the EMIF will care if two or eight pins are swapped just so long as they are in the same byte lane. Just be certain to follow the DDR layout guidelines in section 6.4.2 of the datasheet.

Processors

Processors forum

DM3730 DDR Bit Swapping