1) You probably want to include Schottky Diodes and best to prototype to see what does and doesn't work. If diodes don't work a tranistor or MOSFET circuit should -2) Electrically it's the same as External Flash so leave all QSPI pins floating. You can add a button plus 1K to QSPI_SS, treat it as above, to provide a BOOTSEL button -3) Yes. It's the same as if it were Exterrnal Flash.
Code:
-------------. .----------. QSPI_SS #1 |----.----------| Flash #1 | -------------' | `----------' -------------. | .----------. QSPI_SS #2 |----|-----.----| Flash #2 | -------------' _|_ _|_ `----------' _\ /_ _\ /_ | | _ .|. .|. _|_|_ |_| |_| .---O O---. | | | _|_ `-----^----'Code:
.................. : _ ---------. : __ _|_|_ QSPI_SS |---.---:--- ---|__|---O O---. ---------' | : _|_ .-------. | : | Flash |---' : `-------' : : .................:Statistics: Posted by hippy — Thu Dec 25, 2025 3:13 pm