More instructions means many operations can only be done on certain registers. For example, in the PDF file below you'll see all the instructions used by Atmel MCUs:
http://www.atmel.com/images/doc0856.pdf
Some applications need versatility and more instructions. Someone said, a great user of PIC microcontrollers, it can happen in an application to use all sorts of tricks to achieve a result, a result that can be achieved with a set of specific instructions Atmel AVR.
For this reason (eg fewer instructions) those from Microchip to offset this disadvantage, the clock PIC at a higher frequency than MCU Atmel AVR.
And one major drawback, most microcontroller PIC needs, besides those 5V, of another higher voltage (typically 12 ... 13V) that you can program them but are PIC that support low voltage programming. That's what I forgot to say in the message above, but worth noted here.
For programming AVR microcontrollers only need 5V.
Below I have posted a URL with a very cheap USB Atmel microcontroller programmer:
http://www.ebay.com/itm/New-USB-51-...849?pt=LH_DefaultDomain_0&hash=item3ccb7ad641
http://www.atmel.com/images/doc0856.pdf
Some applications need versatility and more instructions. Someone said, a great user of PIC microcontrollers, it can happen in an application to use all sorts of tricks to achieve a result, a result that can be achieved with a set of specific instructions Atmel AVR.
For this reason (eg fewer instructions) those from Microchip to offset this disadvantage, the clock PIC at a higher frequency than MCU Atmel AVR.
And one major drawback, most microcontroller PIC needs, besides those 5V, of another higher voltage (typically 12 ... 13V) that you can program them but are PIC that support low voltage programming. That's what I forgot to say in the message above, but worth noted here.
For programming AVR microcontrollers only need 5V.
Below I have posted a URL with a very cheap USB Atmel microcontroller programmer:
http://www.ebay.com/itm/New-USB-51-...849?pt=LH_DefaultDomain_0&hash=item3ccb7ad641
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