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Topic: Arduino Mega2560 R3 pinouts photo (Read 73883 times) previous topic - next topic

beddy


GolamMostafa

Please find the attached file for the schematic of ArduinoMEGA which shows some mismatch with the pictorial digarm of ArduinoMEGA of #1.

GolamMostafa

Another version of schematic for ArduinoMEGA.

CrossRoads

There is no attachment GolamMostafa.
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.

GolamMostafa

Inspired by Nick's UNO pinout I did a similar one for the Arduino Mega2560 R3.



Annotations are color coded. Green have the same function and position as the Arduino UNO R3. Red are differences, where the functionality has moved on Mega2560 compared to UNO. In general, this means that the UNO put several functions on one pin and these have moved to separate pins on the Mega. Blue is for differences due to added functionality (extra pins).

I find it convenient to use the GND pins near to the analog input pins as analog grounds, and to use the GND on the end block for digital grounds, when linking to external circuitry.

Update: correct SCL to SCK, correct colors, call out second ICSP header
As per diagra of Arduino Mega 2560 Reference Design diagram:

INT0 : Digital Pin-21
INT1 : Pin-22
INT2 : Pin-23
Inspired by Nick's UNO pinout I did a similar one for the Arduino Mega2560 R3.



Annotations are color coded. Green have the same function and position as the Arduino UNO R3. Red are differences, where the functionality has moved on Mega2560 compared to UNO. In general, this means that the UNO put several functions on one pin and these have moved to separate pins on the Mega. Blue is for differences due to added functionality (extra pins).

I find it convenient to use the GND pins near to the analog input pins as analog grounds, and to use the GND on the end block for digital grounds, when linking to external circuitry.

Update: correct SCL to SCK, correct colors, call out second ICSP header
[/quote]
Inspired by Nick's UNO pinout I did a similar one for the Arduino Mega2560 R3.



Annotations are color coded. Green have the same function and position as the Arduino UNO R3. Red are differences, where the functionality has moved on Mega2560 compared to UNO. In general, this means that the UNO put several functions on one pin and these have moved to separate pins on the Mega. Blue is for differences due to added functionality (extra pins).

I find it convenient to use the GND pins near to the analog input pins as analog grounds, and to use the GND on the end block for digital grounds, when linking to external circuitry.

Update: correct SCL to SCK, correct colors, call out second ICSP header
As per Arduino Mega 2560 Reference Design:

INT0: Digital Pin-21
INT1 : Pin-20
INT2 : Pin-19
INT3 : Pin-18

INT4 : Pin-2
INT5 : Pin-3

GolamMostafa

Inspired by Nick's UNO pinout I did a similar one for the Arduino Mega2560 R3.



Annotations are color coded. Green have the same function and position as the Arduino UNO R3. Red are differences, where the functionality has moved on Mega2560 compared to UNO. In general, this means that the UNO put several functions on one pin and these have moved to separate pins on the Mega. Blue is for differences due to added functionality (extra pins).

I find it convenient to use the GND pins near to the analog input pins as analog grounds, and to use the GND on the end block for digital grounds, when linking to external circuitry.

Update: correct SCL to SCK, correct colors, call out second ICSP header
By continuity measurement, I have found that all connector pins labelled as 'GND' are shorted together; this means that the AGND and DGND pins of ATmega2560 are shorted together at the connectors. Therefore, mark like 'use for analog ground' in not needed. Any GND (0V point) can be used as Ground Reference!

GolamMostafa

Nantonos: just add table with your image ;)


Nantonos's picture of MEGA shows: Digital Pin-2 receives IRQ-signal for INT-0 (interrupt 0) pin of ATmega2560

beddy's Table of MEGA shows: Digital Pin-2 receives IRQ-signal for INT-4 (interrupt 4) pin of ATmega2560

Which one is correct?

CrossRoads

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.

GolamMostafa

What does the Mega schematic show?
https://www.arduino.cc/en/uploads/Main/arduino-mega2560_R3-sch.pdf
Thanks for referring to MEGA schematic which shows: Digital Pin-2 receives IRQ-signal for INT-4 of ATmega2650.

hibaS128

bonsoir
comment on rajoute atmegaS128 sur boards.txt de l'arduino ?merci :smiley-confuse:


Ingeniero1987


I need to control a light tracker by means of a digital PID with arduino. The circuit is simple and consists of a micro servo motor and a photoresistor but, I have no knowledge of the Arduino PID library.

Nick Gammon

What has that got to do with Arduino Mega2560 R3 pinouts photo?
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

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