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02/08/07 13:26
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#132304 - Hey! Where'd you get Rev 2?
Responding to: ???'s previous message
Jan Waclawek said:
P89LPC932A1
Datasheet Rev.02 - 10 May 2005
UM10109 Rev.02 - 23 May 2005

JW


I don't know where you got Rev 2 of the UM for the 932A1, but in my Rev 1 copy it's on page 21, "Section 2.7 Oscillator Clock (OSCCLK) wake-up delay".

Now this section doesn't mention "minimum reset width" anywhere, but combined with the reply from Tech Support, this info can be used to infer the min reset width.

Hmmm. Now that I what I had to do to get this info, I'm even less impressed with their documentation! I shouldn't need to infer anything from a data sheet; it should be spelled out clearly for all to see!

tom

List of 39 messages in thread
TopicAuthorDate
min reset width?            01/01/70 00:00      
   WHY            01/01/70 00:00      
      why?            01/01/70 00:00      
      Which reset chip, and how long a pulse?            01/01/70 00:00      
      "proper supervisor"?            01/01/70 00:00      
         so why ...            01/01/70 00:00      
            Data Sheet vs User Manual            01/01/70 00:00      
               Data Sheet vs User Manual            01/01/70 00:00      
               wherizit?            01/01/70 00:00      
                  Which uP are you looking at?            01/01/70 00:00      
                     P89LPC932A1            01/01/70 00:00      
                        Hey! Where'd you get Rev 2?            01/01/70 00:00      
                           That's it: I said, it is not in the datasheet/UM!            01/01/70 00:00      
                              Webmaster? They have a webmaster?            01/01/70 00:00      
         Only at 5V...            01/01/70 00:00      
         words, words            01/01/70 00:00      
   Does it not have an internal Reset circuit?            01/01/70 00:00      
      now THIS is a BAD documentation            01/01/70 00:00      
         Does it imply            01/01/70 00:00      
            infernal reset (not a typo!)            01/01/70 00:00      
               So, what's the "right" way?            01/01/70 00:00      
                  don't use it as a port pin            01/01/70 00:00      
                     It's not a pitty but a shame!            01/01/70 00:00      
                        it's "creeping feature"-ism            01/01/70 00:00      
                           not a waste            01/01/70 00:00      
         Yes, I remember those many complaints!!            01/01/70 00:00      
         And what about...            01/01/70 00:00      
            internally timed            01/01/70 00:00      
               I LOVE it            01/01/70 00:00      
                  OK so let's vote            01/01/70 00:00      
                     no voting, please            01/01/70 00:00      
                        this is not taste, but facts            01/01/70 00:00      
   So, how's one supposed to reset this thing?            01/01/70 00:00      
   lets see...            01/01/70 00:00      
      Yes, but what's REQUIRED?            01/01/70 00:00      
   Some results            01/01/70 00:00      
      with or without the reset chip?            01/01/70 00:00      
         now with the reset chips            01/01/70 00:00      
            and the troubles were BEFORE or AFTER?            01/01/70 00:00      

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