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David Prentice
01/18/12 05:09
Read: 494 times
Wormshill
England


 
#185549 - Single chip solution is simple
Responding to: ???'s previous message
Since you have experience with PIC, you know that you need little external circuitry for many MCUs. e.g. decoupling caps, reset, optional crystal, ...

If you are connecting to an external bus like MIDI, RS232, RS485 you need external buffer / driver chips.

On board or inside case wiring can often go without any external chips if they are inaccessible to the outside world.

Many 8051 variants have internal pull-ups, push-pull drivers exactly like most other MCU families. This makes life easier.

So I am surprised by your 'buffer' comments.

If your design needs an external memory bus, life gets complicated. I would look for a single chip solution, or even using serial SRAM / EEPROM.

David.

List of 10 messages in thread
TopicAuthorDate
Thanks To All        Jon Wilder      01/18/12 03:28      
   Single chip solution is simple      David Prentice      01/18/12 05:09      
      well, I'm not      Erik Malund      01/18/12 07:38      
         Additional pull-ups are sufficient in many cases...      Kai Klaas      01/18/12 08:22      
            Why not choose a modern 8051?      David Prentice      01/18/12 08:49      
               I wasn't aware...      Jon Wilder      01/18/12 12:29      
                  sure      Erik Malund      01/18/12 12:49      
                     Some Atmel and STC chips too      David Prentice      01/18/12 13:49      
                  SiLabs      Andy Peters      01/19/12 10:17      
                     SILabs      Erik Malund      01/19/12 10:47      

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