At the moment I am designing a PCB with the STM32F4 and PSRAM. Are the FSMC_NEx signals the bank switch signals? Can I use all the FSMC_NEx signals for the PSRAM or are certain banks only for a certain memory (NOR, NAND, etc.)? I use FSMC_NE3 for the CE. Can I use the FSMC_NE1 instead? What can I do with the ZZ signal (Sleep enable) of the PSRAM? Must I connect this PSRAM input to a I/O or a FSMC_? signal? Which FSMC_? signal? Thank you very much for your help.
Ps. Example/reference STM32 schematics are also welcome.