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???
12/02/13 09:21
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#190173 - "working fine" (sic)
Responding to: ???'s previous message
Mohit Gupta said:
My new and old Keyboards are working fine (sic) with ARM and AVR microcontrollers.


Again, that could be more by luck than design.

So what have you done to investigate the differences between the ARM, AVR, and 8051 versions?

Is there be any issue with pull up lines.

Your oscilloscope traces should answer that.

I had checked the timing waves on Oscilloscope and it seems ok.


What does "seems OK" mean?

Have you thoroughly verified it against the specification?

Have you compared the 8051 traces against ARM, AVR, and PCs?

Apart from low-level timing, have you looked for differences in higher-level message details...

List of 16 messages in thread
TopicAuthorDate
Old PS2 Keyboards (White) Working, New Keyboard not working            01/01/70 00:00      
   "working fine" (sic)            01/01/70 00:00      
      PS2 Keyboards are not working            01/01/70 00:00      
          "working fine" (sic)             01/01/70 00:00      
   Maybe this will help            01/01/70 00:00      
      Here's a link that might be useful            01/01/70 00:00      
         Dead horse?            01/01/70 00:00      
            Far too many queries fail to define "working"            01/01/70 00:00      
               Working            01/01/70 00:00      
               RE: Far too many queries fail to define "working"            01/01/70 00:00      
               The difference between "Engineering" and just hacking?            01/01/70 00:00      
                  The core of engineering is not experimenting            01/01/70 00:00      
                     experimenting equals ....            01/01/70 00:00      
                        Yes ... likewise, believing the first page of the datasheet            01/01/70 00:00      
                           RE: believing the first page of the datasheet            01/01/70 00:00      
                              Exactly!            01/01/70 00:00      

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