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???
05/30/06 14:51
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 		 #117281 - Non-zero cost
Responding to: ???'s previous message
V.nagarajan said:
What about the cost of programming the slave micro.

Erik Malund said:
$0 if you ... use an ISP micro.

Well, not exactly zero; eg,
Richard Erlacher said:
ISP is quite slow, as compared with parallel programming. If this is intended for production, that is a valid concern.
http://www.8052.com/forum/read.phtml?id=117279

The time to do it is a (kind of) cost.

There also needs to be some means of connection to do the ISP, and all the set up & programming.

And if the ISP fails, you have a whole board to scrap or rework, rather than just a chip...

Of course, setting up a parallel-programming station also has costs...

List of 28 messages in thread
TopicAuthorDate
passive matrix keyboard readout            01/01/70 00:00      
   yep use the dallas switch debouncers            01/01/70 00:00      
      really, you can't have it both ways            01/01/70 00:00      
   Keypad            01/01/70 00:00      
      what???long weekend maybe            01/01/70 00:00      
         dedicated HW in some '51s            01/01/70 00:00      
   watch human reaction speed            01/01/70 00:00      
   derivative with interrupt on pin change            01/01/70 00:00      
      Or use a maxim 6816            01/01/70 00:00      
         I use SW debouncing...            01/01/70 00:00      
   Can reduce time spent in ISR Key Scan            01/01/70 00:00      
   Use tiny slave micro            01/01/70 00:00      
      Makes sense!            01/01/70 00:00      
         Programming the slave micro            01/01/70 00:00      
            $0            01/01/70 00:00      
               Non-zero cost            01/01/70 00:00      
                  who cares            01/01/70 00:00      
                     The folks who pay will care            01/01/70 00:00      
                        You apply what I said about apples to or            01/01/70 00:00      
                           you missed my meaning            01/01/70 00:00      
                              OK, I'll clarify            01/01/70 00:00      
            Costs? He needs to solve it anyway...            01/01/70 00:00      
               Tme is money            01/01/70 00:00      
                  contradictory            01/01/70 00:00      
         Key bounce.            01/01/70 00:00      
            use a LPC            01/01/70 00:00      
               any MCU will work            01/01/70 00:00      
                  with a LPC you can do either            01/01/70 00:00      

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