Flashing 3.3V Flash ROM on 5V systems
Posted: Sun Dec 26, 2004 5:28 pm
I've got a few dead boards to revive having a corrupted BIOS image, but the flash ROM supply voltage is 3.3V.
I know I may have to look for boards with same supply voltage to the flash ROM to do the hotflash, but the quick fix I'm thinking about is to use my existing board having a 5V flash ROM supply voltage.
I would temporarily disconnect the 5V supply after the system has booted to clean DOS, then inject a 3.3V supply voltage to do the hotflash.
Do you think this is a sound plan? Has anybody tried this approach?
I know I may have to look for boards with same supply voltage to the flash ROM to do the hotflash, but the quick fix I'm thinking about is to use my existing board having a 5V flash ROM supply voltage.
I would temporarily disconnect the 5V supply after the system has booted to clean DOS, then inject a 3.3V supply voltage to do the hotflash.
Do you think this is a sound plan? Has anybody tried this approach?