32 vs 64 bit bus questions

[josephdobesh]

We are deciding whether to design with a 32 bit bus or go to 64. If we use i.MX 6Q, would there be much of a bottle neck when accessing
memory configured as 32bit? We are trying to avoid the hassles that come with laying out a 64 bit bus, plus saving board space and BOM costs. Memory space is not an issue.

[weidong_sun · Accepted solution]

Hello,Joseph,

      Since memory space is not an issue, you can use 32bit DDR3 or LPDDR2 on your i.mx6Q design. but please connect your DDR3 or LPDDR2 chips on Low-32bit bus on CPU side.

Regards,

Weidong