Have first custom board of AM3894A, booting from Samsung SLC NAND K9F2G08U0A
On first stage was have troubles with booting from NAND, after do reset signal more wide and all fixed.
Very strange, but before reset signal patching, booting from SD was working well (only NAND don't booting) ...
So, next generation of board - fixed all bugs, board working very well (include NAND with UBIFS).
But, now system not booting from NAND in any cases of POR and RESET ...
All boards based on AM3894A, but on second board i see on oscilloscope different behavior of NAND CS signal:
on previous board (if CS open) - repeat CS, ALE, CLE sequence, pause ~500ms
on new board - only repeat sequence CS,ALE,CLE without any data activity
May be exist some more terms of boot, not only POR and RESET activity, please any ideas?
