STM32F427/9 has this nice FMC module, which stands for Flexible Memory Controller. It is able to deal with all kinds of memories. For now I want to add external SDRAM to my project to hold large(ish) amount of data captured by sensors (images) for later retrieval over slower UART. 8MB (64Mbit) on Discovery board is quite a bit, but it can hold only 1 raw 5 megapixel image, perhaps multiple JPEGs. I would like to have a bit more, but let's figure out the setup first on a DISCO board, before trying to improve on that.