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???
11/26/10 08:03
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#179635 - Think about it!
Responding to: ???'s previous message
Shivaram Kumara Cunchala said:
I want to know / measure time taken by the controller to execute its bootloader and startup code. before the execution of main function. Does the manufacturer gives us the boottime information in his application note or data sheet.

Think about it: the manufacturer does not write the startup code - so how could they put anything about it into their documents?!

The datasheet should specify things like the time required for the oscillator to stabilise...

If you're talking about a bootloader in ROM, then the manufacturer should know about that. If you can't find the information in their documentation, you would have to ask them.
If this information is really critical to you project, and the manufacturer can't or won't provide it, then you should take that into account inyour decision on which chip to use...

bootloader is not available to the user to be measured by any means.

Of course you can measure it!
Get your application to set some output pin as the very first thing that it does, and measure how long that takes!

we say boot time of embedded system should be very low or less. Then what is the value of that

There is no value! You would have to specific what constitutes "very low" in your particular case!



List of 17 messages in thread
TopicAuthorDate
measuring booting time of any controller            01/01/70 00:00      
   what is            01/01/70 00:00      
      project requirement            01/01/70 00:00      
   Impossible!            01/01/70 00:00      
      boot time of embedded system should be very low            01/01/70 00:00      
         Think about it!            01/01/70 00:00      
            thanks but !!!!!!!!!!!            01/01/70 00:00      
               What's to explain?            01/01/70 00:00      
         simple things            01/01/70 00:00      
         bootloader ???            01/01/70 00:00      
   Simple process            01/01/70 00:00      
      thanks Oliver and ANDY            01/01/70 00:00      
         Design supervision?            01/01/70 00:00      
            it will be reviewed            01/01/70 00:00      
               RE: these were something i could not ask them            01/01/70 00:00      
                  What supervisors?            01/01/70 00:00      
                  In service industry here,            01/01/70 00:00      

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