CubeMX 32-bit SDRAM with STM32F469IIT

[kylepennington]

Posted on July 31, 2017 at 23:37

I'm using CubeMX with the STM32F469IIT and trying to select 32-bit wide SDRAM using the FMC but the options only show 8 or 16-bit.

Is this correct? I can't see anything in the reference manual about 

the LQFP176 not being able to do 32-bits. It works for other 469 chips.

Thanks.

#cube-mx #fmc

[waclawek.jan]

Posted on August 01, 2017 at 01:26

D16..D23 (PH8..PH15)

Compared to 'F429/439 they gave way to the MIPI pins.

JW

[T J]

Posted on August 01, 2017 at 01:47

I had to go to the 208 pin package to get 32 data pins.

[kylepennington]

Posted on August 01, 2017 at 01:50

Yes, thanks Jan, from the datasheet it should be:

FMC_D16...FMC_D31 (PH8...PI10) with some gaps.

but there seems to be a bug in CubeMX which doesn't allow the 32-bit data width to be selected, or I'm doing something else wrong.

[Jan Waclawek]

Posted on August 01, 2017 at 02:02

CubeMX which doesn't allow the 32-bit data width to be selected

Because those pins (D16..D23) are not there on the 176-pin/ball packages.

JW