Hi, I am determining the microcontroller for a project I would like to know the differences between a PIC microcontroller and a 8051 ( e.g. at89s8252) based microcontroller. It seems that both have similar features. Thanks a lot, Andre
I need a microcontroller with the following features: 1) 32 IO 2) 64K code 512+ flash 2K+ eeprom 3) 2 counter (e.g. TIMER0 / TIMER1) 4) 2 external counter (e.g. INT0 INT1) 5) serial interface (such as using TIMER2) 6) C compiler ... which 8051 based microcontroller can I use ? You forgot to ask for the kitchen sink. What are you trying to make? this should get you close: http://www.st.com/stonline/prodpres/memory/psd/pdf/prfinder.pdf Can I have a PIC with these features ? The PIC is specifically made for applications requiring a little, cheap computing, The '51 is when you need a little more and are willing to spend a little more. The requirement you specify above make me wonder if the '51 is right for your application, please let us know. Erik
"You forgot to ask for the kitchen sink." For a fully-fitted kitchen with double sink, waste disposal, dishwasher, etc Try the Triscend E5: http://www.triscend.com/products/e5.htm
You may use the parametric search to help you checking what chips may fall into your peripheral requirements.: http://www.keil.com/dd/parm_search.asp
Microchip has small and cheap devices but also has more powerful and not cheap at all devices. It is a myth that PICs are cheap, only the 8-pin devices are, however, that is what they sell the most. There is definitely a much wider variety of devices available for the 51-architecture from many vendors. The long story short, if you want to depend on one vendor, you can go with Microchip and use a PIC, if you want to have alternatives, you should go with the 51-architecture. Start with Philips and Atmel they have most devices, if you need something more special and are willing to pay more, go to Ctgnal or Triscend. Robert
Just completing your statement: if you want to have alternatives, you should go with the 51-architecture. Start with Philips and Atmel they have most devices, if you need something more special and are willing to pay more, go to Ctgnal or Triscend and lose the alternatives. Erik