It is protected for a reason .... if your unlock it, it is supposed to erase the program content.
I tried with more powerful programmer and it did that, unlock it and you're done.
Reading this thread i don't know why people still have high hope for this gimmick, i had one original TL866 in the past, had many failures and frustrations, ditched it for good.
Would be nicer to reverse engineer the software to make it better, since the hardware is now known ...
Had a TNM5000, sold it for a Beeprog+, but i bought back an TNM5000 again, since their price as gone down, and added in their software what i was missing in chip support, they are supportive and welcoming a few ideas or changes/bugs etc...
The TNM5000 are the most friendly programmer around, cheap cost adapters ... unlike my Elnec, but i mostly use the isp jtag outputs ...
Autoelecric is not.I thought this chip had only write/programming protection? Not read protection. Which comes up my question now that i did read it earlier and saved.. even though it had that one protection ON i should have full copy of that memory? So i changed protection now so it did erase it first?
For your question because cheap.
But i understand i bought Milwaukee drill and not cheap market unit one because i like buy good at once. i fail now.
It is protected for a reason .... if your unlock it, it is supposed to erase the program content.
I tried with more powerful programmer and it did that, unlock it and you're done.
Reading this thread i don't know why people still have high hope for this gimmick, i had one original TL866 in the past, had many failures and frustrations, ditched it for good.
Would be nicer to reverse engineer the software to make it better, since the hardware is now known ...
Had a TNM5000, sold it for a Beeprog+, but i bought back an TNM5000 again, since their price as gone down, and added in their software what i was missing in chip support, they are supportive and welcoming a few ideas or changes/bugs etc...
The TNM5000 are the most friendly programmer around, cheap cost adapters ... unlike my Elnec, but i mostly use the isp jtag outputs ...
Autoelecric is not.I thought this chip had only write/programming protection? Not read protection. Which comes up my question now that i did read it earlier and saved.. even though it had that one protection ON i should have full copy of that memory? So i changed protection now so it did erase it first?
For your question because cheap.
But i understand i bought Milwaukee drill and not cheap market unit one because i like buy good at once. i fail now.Correct.
What possible reason could one have for putting a memory chip in a permanent unreadable mode?
There's a reason write only memory doesn't get used in many products :-)
with the tl866 maybe there was some timing issues or software glitch ??
• The working one has a silver colored circuit around the chip and there is a small knob which is round.
• The not working chip has a gold colored circuit around the chip and there is a small knob which is square.
• The working one has a silver colored circuit around the chip and there is a small knob which is round.
• The not working chip has a gold colored circuit around the chip and there is a small knob which is square.
Same outside package but different semiconductor inside? Production madness? I think you need a µscope to compare properly the two.
I hope you bought more ROM chips that what you need.
2983 should be a Microchip 27C128, can you select that one and try again?
Still weird that it has an ST disguise...
2983 should be a Microchip 27C128, can you select that one and try again?
Still weird that it has an ST disguise...
Hmm, fake parts? I doubt ST ever made a chip that ID's as Microchip.
How did you decode the manufacturers code and device code?
How did you decode the manufacturers code and device code?
There's a big list out there, all you need to do is to find it
http://www.mcumall.com/forum/topic.asp?TOPIC_ID=4974
Edit: Looks like the domain has some problems, bad timing. Now attached as a txt file.
I cannot find a adapter for MiniPro TL866 for Eeproms with 42 pins?
Hmm, fake parts? I doubt ST ever made a chip that ID's as Microchip.
Apart from that, it's wearing a 27128 coat, not the cmos version one.How did you decode the manufacturers code and device code?
I found this chip ID on a 42 pin chip and i cannot identity it with that file you attached?
First number is: 2020(manufacturers code)
Second number is: B2B2 (Device code)
Good find on that adapter board. The ones I saw were supposedly designed for specific programmers other than the TL866.
Do you know what is a keyboard bios controller? Because you have already the answer...