Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
11/11/11 21:08
Read: times


 		 #184647 - Wrong! It won't work with THIS part!
Responding to: ???'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???            01/01/70 00:00      
   What processor            01/01/70 00:00      
      And the winner is...            01/01/70 00:00      
         fuggetabutit            01/01/70 00:00      
            Hmmmmmm            01/01/70 00:00      
               sure there is            01/01/70 00:00      
               Costly failure            01/01/70 00:00      
                  Well, the UV thing confuses me...            01/01/70 00:00      
                     well, then ....            01/01/70 00:00      
                     OTP or mask-programmed            01/01/70 00:00      
                     Isn't that a clue?            01/01/70 00:00      
                  Wrong! It won't work with THIS part!            01/01/70 00:00      
                     8032            01/01/70 00:00      
                        Actually ...            01/01/70 00:00      
                           What situation would that be?            01/01/70 00:00      
                              I think you're confusing two different parts.            01/01/70 00:00      
                           There's the thing!            01/01/70 00:00      
                              It all depends on what you mean by experienced.            01/01/70 00:00      
                                 RE: It all depends on what you mean by, "experienced"            01/01/70 00:00      
                                    "Level" is such a relative term            01/01/70 00:00      
                              That's the reason            01/01/70 00:00      
                        8032?            01/01/70 00:00      
                           Yes - but is it worth it?            01/01/70 00:00      
                           It's a long, circuitous path ...            01/01/70 00:00      
                     I have an external UV EPROM            01/01/70 00:00      
                        If you don't know that, ...            01/01/70 00:00      
         Unless you have specific interest in vintage electronics ...            01/01/70 00:00      
            So...I've made a decision..sorta            01/01/70 00:00      
               One step at a time            01/01/70 00:00      
                  Any specific one though?            01/01/70 00:00      
                     This one?            01/01/70 00:00      
         Not this one!            01/01/70 00:00      
            Hmmm, a goal?            01/01/70 00:00      
               Wrong road!            01/01/70 00:00      
                  Regarding knowledge of electronics.            01/01/70 00:00      
                     RE: "fourth grade"            01/01/70 00:00      
                        RE:RE:Fourth grade            01/01/70 00:00      
               if the "self taught home-school class" refer to the archaric            01/01/70 00:00      
                  When throwing out bathwater, take care to retain baby...            01/01/70 00:00      
                     out of sheer nostalgia            01/01/70 00:00      
                     It might, in fact, be a good thing to go back farther            01/01/70 00:00      
                        Interesting            01/01/70 00:00      
                           You need to know much more about two things ...            01/01/70 00:00      
                  About other processors            01/01/70 00:00      
                     The prices were on the page!            01/01/70 00:00      
                     SiLabs Boards            01/01/70 00:00      
                     Integrated            01/01/70 00:00      
                     here            01/01/70 00:00      
                        Code flash not always able to replace EEPROM            01/01/70 00:00      
                           agreed            01/01/70 00:00      
                              Yes            01/01/70 00:00      
                              Yes            01/01/70 00:00      
               Maybe a heretic idea...            01/01/70 00:00      
                  There's a problem with these ...            01/01/70 00:00      
                     Not for the intended purpose....            01/01/70 00:00      
                        Single source            01/01/70 00:00      
                           Just another chance.....            01/01/70 00:00      
                        If you read his entire post ...            01/01/70 00:00      
                           I have six other microprocessors that i found yesterday            01/01/70 00:00      
                              Well, this is not the PIC forum ...            01/01/70 00:00      
                                 I was just saying...            01/01/70 00:00      
                              'found'stuff            01/01/70 00:00      
                                 I have to agree, conditionally            01/01/70 00:00      
                           learning about microcontrollers            01/01/70 00:00      
                              Arduino is a very good choice if not going 8051 route            01/01/70 00:00      
                              Careful, now ...            01/01/70 00:00      
                     spend some $$$ on an already-assembled product            01/01/70 00:00      
                        in for a penny, in for a pound ...            01/01/70 00:00      
                           Still easier to learn to program before bringing up first hw            01/01/70 00:00      
                              I'm not so sure ... maybe we'll just have to disagree            01/01/70 00:00      
               If you're really serious about this ...            01/01/70 00:00      
                  tools and such            01/01/70 00:00      
                     Well ... maybe your Dad can fill you in on some details            01/01/70 00:00      
         re: 8052            01/01/70 00:00      
            Switched            01/01/70 00:00      
            no offense, but that's incorrect.            01/01/70 00:00      

Back to Subject List