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04/15/05 12:20
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#91628 - I'm not the guilty party....
Responding to: ???'s previous message
I just need to comment about the story I wrote about the problems with the 6275. I was not the hardware designer of this control panel product that mixed the 5V part with the 3.3V microcontroller. If it had been me designing the thing I would have used another approach with a 3.3V shift register an some other LED drive technique.

All that said....when I contracted for some software development in this case I had to try to make the designers stuff work somehow. The build was strictly limited to 10 units and he already had all the parts on the boards that needed to deliver in 3 days from when my software saw first light on the target hardware.

That same project used (I thought) an AT24C01A serial EEPROM. I had that part on my development prototype but at integration time we see that the purchased part was an AT24C01. It being late Friday night there was no choice for me but to roll up the speeves and change my bit bang code to support the different addressing scheme that the non-A part uses.

It is always 3 times more work getting somebody elses hardware working than your own.

Michael Karas


List of 32 messages in thread
TopicAuthorDate
Tutorial For MAX7219            01/01/70 00:00      
   Maxim            01/01/70 00:00      
   Part of the problem            01/01/70 00:00      
      Read the App Notes            01/01/70 00:00      
   MAX7219            01/01/70 00:00      
   heve you considered the 6275 and 6276            01/01/70 00:00      
      20-20 hindsight            01/01/70 00:00      
      re 6275/6            01/01/70 00:00      
         6275            01/01/70 00:00      
            3.3 to 5 and more            01/01/70 00:00      
               I'm not the guilty party....            01/01/70 00:00      
         16-bit shift+latch+current mirror            01/01/70 00:00      
      Thanks Erik!            01/01/70 00:00      
      Erik: 6275 For Common Cathode Displays?            01/01/70 00:00      
         Anyone Hasve Any Other Suggestions?            01/01/70 00:00      
            How many            01/01/70 00:00      
               # of Displays            01/01/70 00:00      
                  How many DISPLAYS            01/01/70 00:00      
                     In other words            01/01/70 00:00      
            yes            01/01/70 00:00      
            How to wire Common Cathode Displays            01/01/70 00:00      
   What to Use For Clock Source?            01/01/70 00:00      
      Clock confusion            01/01/70 00:00      
         How Does This Match w/ A6276?            01/01/70 00:00      
            DATA sheet ?            01/01/70 00:00      
            Synchronous data transfer            01/01/70 00:00      
               Do I Add A Clock IC?            01/01/70 00:00      
                  NO !            01/01/70 00:00      
                     if no hardware SPI            01/01/70 00:00      
                        Tie Clock and Latch Enable Together?            01/01/70 00:00      
                           No            01/01/70 00:00      
                           if you do            01/01/70 00:00      

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