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???
02/06/07 15:00
Modified:
  02/06/07 15:02

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#132140 - not necessarily
Responding to: ???'s previous message
Why does everyone insist on having me spend money on other chips???

Don't people ever think about using what they got?

because
a) your supplier screwed you by getting rid of outdated stock
b) you bought chips and THEN came here "what do I do". Had you proposed your scheme BEFORE buying chips, you would have been advices to buy specific chips, not other chips

But the way to do it is to switch PSEN to some other chip that simply contain at addtress zero a jmp $.
And how an I supposed to do that without programming a chip?

A two byte 'ROM' can be wired up, no need using a memory chip.

Erik



List of 45 messages in thread
TopicAuthorDate
CMOS?            01/01/70 00:00      
   74HC and 74HCT IS CMOS!            01/01/70 00:00      
      yes            01/01/70 00:00      
         a datasheet and a calculator            01/01/70 00:00      
   Why do you want to "process the PSEN signal" I kno            01/01/70 00:00      
      You need to stick your nose in the books, Mike            01/01/70 00:00      
         umm.            01/01/70 00:00      
            WHAT are you doing with the PSEN ?            01/01/70 00:00      
               programmer + system            01/01/70 00:00      
                  80C51BH doesn't have EPROM            01/01/70 00:00      
                     He's using it as an 80C31            01/01/70 00:00      
                     im meant            01/01/70 00:00      
                  Ambiguous            01/01/70 00:00      
                     LPT            01/01/70 00:00      
                        Is it T0 and T1, or T1 and T2?            01/01/70 00:00      
                           T0 and T1 and, for a '52 T2            01/01/70 00:00      
            What do you mean \"ummm\"            01/01/70 00:00      
               welcome to "Trying"            01/01/70 00:00      
                  nobody thinks you're stupid, however ...            01/01/70 00:00      
                     answer.            01/01/70 00:00      
                        why screw with the clock?            01/01/70 00:00      
                           stop trying to make deals!            01/01/70 00:00      
                              not necessarily            01/01/70 00:00      
                                 ok            01/01/70 00:00      
                                    sorry, I goofed            01/01/70 00:00      
                              Because...            01/01/70 00:00      
                                 Yes, but will it work? It's ATMEL ... (yechhh!)            01/01/70 00:00      
                                 Just to play it safe            01/01/70 00:00      
                                    or try the Maxim/DALLAS parts ...            01/01/70 00:00      
                                       BINGO            01/01/70 00:00      
                                       Not a good first chip            01/01/70 00:00      
                                          What's his primary purpose            01/01/70 00:00      
                                       Mike - FREE CHIP            01/01/70 00:00      
                        An easier way?            01/01/70 00:00      
                           if he is to get another chip, then            01/01/70 00:00      
                              Harder than it needs to be            01/01/70 00:00      
                                 Let him do what he wants! He'll learn something.            01/01/70 00:00      
                                    a small correction            01/01/70 00:00      
                                       Well, I wouldn't know ... I don't use ATMEL            01/01/70 00:00      
                                    answers....            01/01/70 00:00      
                                       TOTALLY and ABSOLUTELY incorrect. if "the flash            01/01/70 00:00      
                                          .            01/01/70 00:00      
                                             Mike ,,, there are other problems ...            01/01/70 00:00      
                        There may be some surprises ...            01/01/70 00:00      
               two Timers            01/01/70 00:00      

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