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STM32 with SDRAM: How to connect unused DQMs?

Question asked by Lars Beiderbecke on Feb 12, 2018
Latest reply on Feb 13, 2018 by Lars Beiderbecke

I'm about to use a STM32F7 MCU with some x16 SDRAM. Since I don't use byte or unaligned accesses, I disabled the NBL pins, which should otherwise be connected to DQMH/L at the SDRAM.

 

But if I don't use those signals, how should DQMH/L be connected? I've checked several SDRAM data sheets, but this case is never mentioned. One manual seems to suggest to connect both to GND, another site says to connect them to the NOR or WE and CAS.

 

So, which way is it?

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