|T O P I C R E V I E W
||Posted - 02/01/2006 : 14:17:39
I have just purchased a dual power programer, I am trying to program a AM29F040B chip but I keep getting an error at 0x0001a8 chip=0xe5.
when i erase this chip it goes to about 12% then says erase completed by check DQ7, when i do a blank test it tells me the chip is blank. one time it programed all the way but when i read the chip it is empty. I have tried 5 different chips 4 different computers, when i test hardware the vpp is getting 12vots, vcc is 5volts. the vcc led comes on when i erase and try to program, the red led does not light at all except for when i first turn the computer on then it goes out after I start EPROM3. the jumpers and dips are set as it shows in the software. I am chosing the M29F040B from the device menu as i do not see a choise for Am29F040B. the bios is set for ecp/epp have also tried ecp did not make a difference. any help would be appriecated. Thank You
|4 L A T E S T R E P L I E S (Newest First)
||Posted - 02/02/2006 : 14:44:43
i believe you are correct that i have prtocted sectors, when i read then check the buffer everything is FFFFFFFFFFFFF I try to unprotect the sectors by using the device menu unprotectAM29040 then the proper die number and following the correct steps but when i get to up protect sectors i click the button then get error (device code mismatch). when id is clicked in unprotect sectors, 00000-0ffff is 1A and all the rest say FF so i am assuming that those are protected but i cannot unprotect any ideas.
||Posted - 02/02/2006 : 08:56:58
I have tried all the different software versions still can not program, the chip does id ok, reads ok, erases ok. does anybody have any idea what i should try next.
||Posted - 02/02/2006 : 01:07:00
try to erase with 0.97g SW
when programing use 0.97a SW chose device 39f040 it worked for me some time ago
||Posted - 02/01/2006 : 15:24:26
Your setting and connection seems fine. The erase is working since you can do blank check. The chip only uses 5V Vcc, so it's nothing to do with the 12V Vpp.
Can you get ID correctly?