DDR3 Bit Swaaping

[muralikrishna]

We swapped the DDR3 bits as recommended.

How to map these bits to processor while initializing.

[CommunityBot · Accepted solution]

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[art]

Also, when swapping the byte lanes, don't forget to route correctly the strobe and mask signals, i.e. DQMx, DQSx and DQSx_B, corresponding to these byte lanes.

Have a great day,
Artur

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[igorpadykov]

Hi Murali

there is no need for additional mapping or software reconfiguration, as

it is done automatically. Bit swapping is described in sect.3.5.1 Swapping data lines IMX6DQ6SDLHDG also

below part of p.4 SPF-27392 Sabre Schematic i.MX6_SABRE_SDP_DESIGNFILES :

Best regards

igor

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[muralikrishna]

Hi igor,

Bit swapping in Hardware is taken care.

How to implement those bit swappings in software to write or read to DDR3

Murali

[igorpadykov]

Hi Murali

in general it is not possible to implement bit swappings in software.

If you followed Freescale recommmendations, there is no need

for additional mapping or software reconfiguration,

Best regards

igor