Thank you man, you’re the best! I’ve got a bunch of PCBs with AT901200-12PI chips on them, basically I’ve got them from trash. They have both lockbits set, SPIEN off and RCEN on. I’ve tried using Fusebit Doctor on 2 of those so far, and unsuccessfully. Here is what happens: when I tell the Doctor to erase chip, it resets lockchips, but SPIEN stays disabled. If I tell it to reset fuses to default, it does not do that, instead it breaks the first byte of chip signature. When I connect such chip to my serial programmer (I use USB-ASP) and read fuses, it says LOW fuse is 0xFE (same as LOCK value). Does that make any sense?
↧