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iMX6UL - Connect unused ADDR lines on DDR3?

Question asked by ehwsma on Feb 2, 2018
Latest reply on Feb 6, 2018 by igorpadykov

Hi,

 

I'm currently working on the design of a board which uses a i.MX6UL + DDR3 RAM memory.

At the moment we selected a 1Gb DDR3 (x16), but we might change it to 2Gb in the future.

 

The only difference when switching between capacity is the number of address lines used:

- Only ADDR[0..12] for 1Gb

- ADDR[0..13] for 2Gb

- ADDR[0..14] for 4Gb

...

 

As unused ADDR lines are recommended to be NC, is it an issue if those lines are connected after all to ensure higher capacity compatibility?

 

Thanks

 

Sébastien

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