STM32H755ZIT6 - Why I can't select SRAM in FMC memory type option?

[TKuo.1]

I'm using STM32H755ZIT6 MCU. And I want to choose SRAM in the FMC memory type option. However, it doesn't show up in the drop-down menu. What am I missing here?

[TDK · Accepted solution]

The package is probably missing the necessary pins for the SRAM.

Yep, looks like the LQFP144 doesn't have the FMC_A0 pin broken out.

[TKuo.1]

Thanks for the information! I understand it now.