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Erik Malund
02/21/12 14:03
Read: 749 times
Mt Airy, Nc
USA


 
#186118 - "elegant" solutions that backfired
http://www.8052.com/forumchat/read/186041 has the following:
Switching to external with no external clock source present will essentially turn off [the watchdog] that runs off that clock.
Is it just me or does this arrangement have a design flaw? One write can essentially turn off the watchdog and the reset controller

The above is beautiful, some want to run the WD from a separate clock, some do not (use a bit - sounds good). That it effectually makes the watchdog worthless was never realized (or was it ignored?).

I am sure I know of more but the only one that comes to mind right now is the STM32f1xx IC where the designers decided to double buffer it (sounds nice) and as a result ended up with workarounds galore in the errata.

Who has more - naah, let's not limit it to chips, go ahead tell us about the good ideas you or someone else had that backfired.

Erik


List of 7 messages in thread
TopicAuthorDate
"elegant" solutions that backfired      Erik Malund      02/21/12 14:03      
   "The road to hell is paved with good intentions"        Kalpak Dabir      02/21/12 18:02      
      If the road to Hell ...      Joseph Hebert      02/24/12 08:41      
         It sounds like ...      Christoph Franck      02/25/12 08:21      
            re shortcuts      Erik Malund      02/29/12 07:38      
   "The Price of Tools"      Michael Karas      02/21/12 21:15      
   The famous (and deadly) example:      Christoph Franck      02/29/12 03:38      

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