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Topic: Arduino Mega2560 R3 pinouts photo (Read 132196 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

#35
Mar 01, 2017, 06:31 am Last Edit: Aug 14, 2017, 09:37 am by 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.

nickgammon

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

MarekBujko

#43
May 29, 2018, 10:28 am Last Edit: May 29, 2018, 10:43 am by MarekBujko
Where are 4 Input Captures marked? They are cutted. Why? :(

blimpyway

#44
Aug 05, 2018, 10:01 am Last Edit: Aug 05, 2018, 10:05 am by blimpyway
Hi,

I tested a sketch with Nano and want to make sure it also runs on  Mega 2560, which I do not have.

The sketch uses a pair of analog pins (A4 and A5) which are swapped alternatively between analog input and digital output with e.g. pinMode(A5, INPUT) then later pinMode(A5,OUTPUT) then repeat .

On Nano only pins A0 to A5 can be used in both modes, A6 and A7 can be used only as inputs. (Well the code compile and runs "fine" just that it does not work as it should when the pin is used in digital output mode)

My only concern here is there any such limitation with Mega2560 pins too? If yes, which pins?

thanks.

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