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???
02/02/08 19:27
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#150232 - This is funny!
Responding to: ???'s previous message
Erik Malund said:

1) brownout
2) power down
3) power up
4) badly designed uC i.e. reset is clocked, not DC

The above is pure speculation, have no proof or whatever.

However, when it is proven not by actual measurements, but by all senior members here, (with the exception of Richard), having had the problem disappear by a solid powerup/powerdown/brownout detector resetting the uC, then that should be good enough.

I can not say this for sure, but it seems that liking Dallas uCs and not believeing supervisors will fix the problem goes together (see 4) above)

Erik


Nobody asked you, Erik, but, of course, you had to spout on anyway.

Basically, when I previously did ask you, you said that you'd gotten phone calls that told you that your circuit had to be power-cycled twice in order to get it to start. Then, when asked how the problem was addressed, your response amounted to, "well, my original circuit didn't work right, so I designed another one and it seemed to work because the phone calls stopped coming." Your only observations were those phone calls, and your solution was to slap together a different circuit. You concluded that the new circuit works because the customer stopped complaining. You apparently didn't observe the problem yourself, and you didn't attempt to make any relevant physical observations to support the notion that the problem, which you hadn't personally observed, was alleviated.

Now you come along saying that the Intel, AMD, Philips, and Maxim/Dallas MCU's are badly designed? Further, I've seen you offer no concrete support for the notion that one or another MCU's RESET is or is not clocked. Lynn Reed offered the notion that all of them were clocked, which is probably true of the originals, anyway.

BTW, that RESET failure that I observed was in a circuit that uses a supervisor, and RESET was true during the accesses to external memory. That was not a rigorous examination, though it's clear you're not in the habit of pursuing problems rigorously. It was observed with oscilloscope and logic analyzer, though, and not just by phone.

RE






List of 32 messages in thread
TopicAuthorDate
C8051F340 Flash corruption problem            01/01/70 00:00      
   use an open collector supervisor ana a pullup            01/01/70 00:00      
   No problem on my end            01/01/70 00:00      
      Grant, can you confirm            01/01/70 00:00      
         Not at this time            01/01/70 00:00      
         Yes, it's a 4k7 pullup            01/01/70 00:00      
   Why do you believe it's going awry during powerup?            01/01/70 00:00      
      likelyhoods            01/01/70 00:00      
         This is funny!            01/01/70 00:00      
            statistical probability            01/01/70 00:00      
               So you conclude that the world is flat?            01/01/70 00:00      
                  who on earth in his right mind would do that?            01/01/70 00:00      
                     someone who is curious about RESET.            01/01/70 00:00      
                        8051f12x/f13x            01/01/70 00:00      
                           It's not that simple ...            01/01/70 00:00      
                              I have a paid job            01/01/70 00:00      
                                 Indeed you have            01/01/70 00:00      
                                    if 1 million people get sick ...            01/01/70 00:00      
                                       It ain't necessarily so            01/01/70 00:00      
                                          3 things you did not respond to            01/01/70 00:00      
                                             that's not how it works            01/01/70 00:00      
                                                it his not 'details'            01/01/70 00:00      
                                                   What does "works" mean?            01/01/70 00:00      
   SiLabs view on this issue            01/01/70 00:00      
      re a point            01/01/70 00:00      
         I am reading some interesting discussion            01/01/70 00:00      
            AP, yes, Richard read that all say the same.            01/01/70 00:00      
            That means NO??            01/01/70 00:00      
               HUH?            01/01/70 00:00      
   Qazi Please provide some details            01/01/70 00:00      
   flash corruption or write failure            01/01/70 00:00      
      answer to quiz!            01/01/70 00:00      

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