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Topic: which microcontroller for Arduino uno (Read 587 times) previous topic - next topic

wattsohn

Hey guys,

which powerful ( most important is the pins number) microcontroller would you advise me for an Arduino uno?

bubulindo

Arduino UNO is based on an ATmega328. 28 pins, of which 18 are usable.

If you need more pins, get an Arduino Mega.
This... is a hobby.

wattsohn

thx ..still got one more question. Does the Arduino uno support the ATxmega* microcontroller ?


CrossRoads

"28 pins, of which 18 are usable."
20 are usable - 2 are typically tied up with serial interfacing, but if you are not doing that they are available for other uses.

ATxmega* - check at www.avr-developers.com

If you need some more IO (32) or more RAM (16K, 128K of flash memory), check out '1284 based designs as well.
For example, Reply # 287 on page 20 here
http://arduino.cc/forum/index.php/topic,80483.285.html
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Grumpy_Mike

Quote
"28 pins, of which 18 are usable."

There is pin 0 to pin 18 - that makes 19 input / output pins in all.

Quote
which powerful ( most important is the pins number) microcontroller would you advise me for an Arduino uno?

This question makes no sense because there is not a choice, if you choose the Uno you get a Uno.
If you actually just mean Arduino and not Arduino Uno, then as has been said it is a Arduino mega.

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