STM32H7 with 32bit bus SDRAM GPIO assignment

[nadavb]

Hi,

Can I connect a 32bit bus SDRAM to STM32H7 and assign the FMC IOs as I wish or should I stick with the Alternate functions of the GPIOs?

Specifically:  can I map 32 GPIOs to STM32H7 models with 144 LQFP package where the GPIO for D31, D30 etc.... (PI9, PI10, ...) are not exposed?

Is there a LQFP STM32H7 with 32bit bus exposed?

Thanks

[TDK · Accepted solution]

> can I map 32 GPIOs to STM32H7 models with 144 LQFP package where the GPIO for D31, D30 etc.... (PI9, PI10, ...) are not exposed?

No, you can't choose any pin. Only those with the FMC_* alternate function can act as those pins.

> Is there a LQFP STM32H7 with 32bit bus exposed?

The LQFP208 seems to have all necessary pins.