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SDRAM Little endian & big endian confusion for MPC8270

Question asked by Muhammad Ahmed on Mar 20, 2018
Latest reply on Mar 21, 2018 by Serguei Podiatchev

Hi i am interfacing IS45S16320F-7BLA2 (SDRAM 32Mx16) with MPC8270. As per reference manual of MPC8270 on pg# 11-34 it connects address and data lines in ascending order. (A0 - A0)

 

But the reference design which i am following is PQ2FADS-VR. It is also attached in this post.

In this design it is interfacing MPC8275 Address with SDRAM in descending order. (A28 - A0) .

 

 

And for Flash both address and data is in descending order. I do not get it . What is the right configuration. Kindly help me.

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