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Richard Erlacher
11/11/11 14:08
Read: 557 times
Denver, Co
USA


 
#184647 - Wrong! It won't work with THIS part!
Responding to: Per Westermark's previous message
Per Westermark said:
Jacob Drake said:
So there is no way to build the devices necessary for writing and erasing?

Of course there is.

This part number is for a hard-coded ROM-based unit. Nothing will erase it. It's a plastic part, IIRC, and that means there's no accessible EPROM.

But it takes lots of money to build the programmer.

Yes, probably in the tens of billions of dollars.

More money than the chip is worth.

And high-voltage programming means that if you have an error in your home-built programmer, you fry the chip. Then you have a broken programmer and a broken processor and have lost a lot of time and the money you spent for parts to the programmer.

I doubt any amount of effort/money will make THIS part reprogrammable.

If the programmer "works", then you have a problem that too short programming time or too low programming voltage can result in a chip that looks programmed. But some memory cells are marginal and will give read errors now and then - more and more as the time goes since you "programmed" the chip.

It's pretty certain that it won't work under any circumstances.

And if you do program something, but finds out that there is a bug and you need to reprogram, then you first have to erase the chip. Most probably, you chip already have contents now, so needs erasing anyway. To erase, you either have to wait a very long time with the chip in the sun. Or buy a special UV lamp (that has a very dangerous wavelength making it important that you do not look into it).

So the end result is that you will hate microcontrollers, or even electronics in general, while you throw out your now totally worthless gear.

Why should we recommend you to take this route, when we more or less know that it will be very costly or a failure. But most probably both.


I'd bet a week's pay that THIS part can't be erased or reprogrammed under any circumstances. The only useful function it can perform is (1) its intended purpose, or (2) some program that runs in external memory.

RE



List of 76 messages in thread
TopicAuthorDate
How to write programs to internal memory with RS232???      Jacob Drake      11/11/11 00:56      
   What processor      Per Westermark      11/11/11 01:05      
      And the winner is...      Jacob Drake      11/11/11 11:13      
         fuggetabutit        Erik Malund      11/11/11 11:42      
            Hmmmmmm      Jacob Drake      11/11/11 11:53      
               sure there is      Erik Malund      11/11/11 12:15      
               Costly failure      Per Westermark      11/11/11 12:20      
                  Well, the UV thing confuses me...      Jacob Drake      11/11/11 12:26      
                     well, then ....      Erik Malund      11/11/11 12:56      
                     OTP or mask-programmed      Per Westermark      11/11/11 13:00      
                     Isn't that a clue?      Richard Erlacher      11/11/11 14:09      
                  Wrong! It won't work with THIS part!      Richard Erlacher      11/11/11 14:08      
                     8032      Per Westermark      11/11/11 14:39      
                        Actually ...      Richard Erlacher      11/11/11 23:50      
                           What situation would that be?        Per Westermark      11/12/11 05:25      
                              I think you're confusing two different parts.      Richard Erlacher      11/13/11 01:09      
                           There's the thing!      Andy Neil      11/12/11 05:37      
                              It all depends on what you mean by experienced.      Jacob Drake      11/12/11 12:54      
                                 RE: It all depends on what you mean by, "experienced"      Andy Neil      11/12/11 13:03      
                                    "Level" is such a relative term      Jacob Drake      11/12/11 17:35      
                              That's the reason      Richard Erlacher      11/13/11 01:15      
                        8032?      Jacob Drake      11/12/11 00:47      
                           Yes - but is it worth it?      Andy Neil      11/12/11 04:30      
                           It's a long, circuitous path ...      Richard Erlacher      11/13/11 01:24      
                     I have an external UV EPROM      Jacob Drake      11/12/11 00:38      
                        If you don't know that, ...      Andy Neil      11/12/11 04:35      
         Unless you have specific interest in vintage electronics ...      Andy Neil      11/11/11 13:13      
            So...I've made a decision..sorta      Jacob Drake      11/12/11 23:51      
               One step at a time      Andy Neil      11/13/11 00:21      
                  Any specific one though?      Jacob Drake      11/13/11 00:28      
                     This one?      Andy Neil      11/13/11 01:04      
         Not this one!        Richard Erlacher      11/11/11 13:55      
            Hmmm, a goal?      Jacob Drake      11/12/11 00:44      
               Wrong road!      Andy Neil      11/12/11 05:07      
                  Regarding knowledge of electronics.      Jacob Drake      11/12/11 12:57      
                     RE: "fourth grade"      Andy Neil      11/12/11 13:10      
                        RE:RE:Fourth grade      Jacob Drake      11/12/11 17:36      
               if the "self taught home-school class" refer to the archaric      Erik Malund      11/12/11 08:17      
                  When throwing out bathwater, take care to retain baby...      Andy Neil      11/12/11 10:16      
                     out of sheer nostalgia      Erik Malund      11/12/11 16:44      
                     It might, in fact, be a good thing to go back farther      Richard Erlacher      11/13/11 01:37      
                        Interesting      Jacob Drake      11/14/11 00:15      
                           You need to know much more about two things ...      Richard Erlacher      11/14/11 12:51      
                  About other processors      Jacob Drake      11/12/11 13:01      
                     The prices were on the page!      Andy Neil      11/12/11 13:07      
                     SiLabs Boards      Michael Karas      11/12/11 13:42      
                     Integrated      Per Westermark      11/12/11 14:57      
                     here      Erik Malund      11/12/11 16:34      
                        Code flash not always able to replace EEPROM      Per Westermark      11/12/11 16:56      
                           agreed      Erik Malund      11/12/11 17:24      
                              Yes      Jacob Drake      11/12/11 17:42      
                              Yes      Jacob Drake      11/12/11 17:42      
               Maybe a heretic idea...      Matthias Arndt      11/13/11 04:44      
                  There's a problem with these ...      Richard Erlacher      11/13/11 12:56      
                     Not for the intended purpose....      Matthias Arndt      11/14/11 00:49      
                        Single source        Per Westermark      11/14/11 01:02      
                           Just another chance.....      Michael Karas      11/14/11 04:46      
                        If you read his entire post ...      Richard Erlacher      11/14/11 13:00      
                           I have six other microprocessors that i found yesterday      Jacob Drake      11/14/11 13:12      
                              Well, this is not the PIC forum ...      Richard Erlacher      11/14/11 13:37      
                                 I was just saying...      Jacob Drake      11/14/11 15:02      
                              'found'stuff      Erik Malund      11/15/11 06:31      
                                 I have to agree, conditionally      Richard Erlacher      11/15/11 10:08      
                           learning about microcontrollers      Andy Neil      11/14/11 15:24      
                              Arduino is a very good choice if not going 8051 route        Per Westermark      11/14/11 16:54      
                              Careful, now ...      Richard Erlacher      11/15/11 10:38      
                     spend some $$$ on an already-assembled product      Andy Neil      11/14/11 15:14      
                        in for a penny, in for a pound ...      Richard Erlacher      11/15/11 10:57      
                           Still easier to learn to program before bringing up first hw      Per Westermark      11/15/11 11:26      
                              I'm not so sure ... maybe we'll just have to disagree      Richard Erlacher      11/16/11 11:32      
               If you're really serious about this ...      Richard Erlacher      11/13/11 14:01      
                  tools and such      Jacob Drake      11/14/11 09:58      
                     Well ... maybe your Dad can fill you in on some details      Richard Erlacher      11/14/11 13:13      
         re: 8052      Andy Peters      11/14/11 12:57      
            Switched      Per Westermark      11/14/11 13:18      
            no offense, but that's incorrect.      Richard Erlacher      11/14/11 13:24      

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