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Erik Malund
11/30/11 08:20
Read: 402 times
Mt Airy, Nc
USA


 
#184958 - the ultimate joke
Responding to: Per Westermark's previous message
So RC resets should be hunted down and be terminated.
totally agree.

the ultimate joke is that whreas the SILabs chips have an excellent interanl watchdog, sonme i - eh some one managed to get a "noise suppression capacitor" added on the SILabs devboards effectively converting the (open drain) supervisor to a RC reset.

If you scan the SILabs forum you will find tons of posts "remove that capacitor"

What is even worse, is that many use the devboard schematics as "reference designs" and faithfully put the cap on.

Erik

PS re "the SILabs chips have an excellent interanl watchdog" I have found that the internal watchdogs work well on chips with a large analog content and not too well on chips with no/very little analog content. I guess this is due to "when doing analog anyhow" to include a good supervisor is simple, if you have to add this analog function to an otherwise digital chip, you take shortcuts.

List of 25 messages in thread
TopicAuthorDate
P89V51RD2 And Flash Magic      Arif Deshmukh      11/26/11 18:48      
   please suggest      Andy Neil      11/26/11 23:27      
   reset button      Jan Waclawek      11/27/11 01:52      
      Reset Button      Arif Deshmukh      11/27/11 09:26      
         reset circuit      Jan Waclawek      11/27/11 13:04      
            That's the fundamental flaw with RC resets!      Andy Neil      11/28/11 14:40      
   Use a MAX700      Matthias Arndt      11/29/11 00:15      
      Rest supervisor        Steve M. Taylor      11/29/11 03:56      
         How Many Times      Michael Karas      11/29/11 05:03      
            This will continue until ...      Richard Erlacher      11/29/11 15:08      
               Power dip      Per Westermark      11/30/11 05:01      
                  real, but worse if flash      Erik Malund      11/30/11 07:17      
                  note, that here the main problem is NOT power related...      Jan Waclawek      11/30/11 07:17      
                     Yes      Per Westermark      11/30/11 07:42      
                        the ultimate joke      Erik Malund      11/30/11 08:20      
                           SiLabs watchdog      Andy Peters      11/30/11 09:25      
                              clarification      Erik Malund      11/30/11 09:43      
                                 Beware flash erase time      Maarten Brock      12/01/11 10:03      
                           brownout detection      Maarten Brock      12/01/11 10:07      
                              well,      Erik Malund      12/01/11 10:09      
                  It's not the spec's ... it's the lack of them.      Richard Erlacher      11/30/11 12:43      
   Reset Chip?      Arif Deshmukh      11/29/11 21:04      
      Why Ask???      Michael Karas      11/29/11 21:33      
         Thanks      Arif Deshmukh      11/30/11 00:29      
            a plethora of possible chips      Erik Malund      11/30/11 07:19      

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