Arduino Mega2560 R3 pinouts photo

A table of pins 1-100 on the Atmega2560 with the corresponding Arduino Mega pin number mappings would be ideal.

Hi there,

I noticed that the pdf drawing on the Arduino Product web page shows 2 crystals 16Mcs, however there's only one on the board??
Furthermore, the downloadable eagle files do not open in my Eagle: Invalid data error

I am experiencing communication probs, possibly coming from one clock source for the 2560 & 16U2, derived from 1 crystal, only.

Could you please clarify?

Thank's

hk

Hi there,
http://pighixxx.com/megapdf.pdf
http://pighixxx.com/atmega2560v3_0.pdf

Greeting and fun
Andreas

Just out of curiosity does an Ethernet shield connect the same way and is just as efficient on the mega? Or must I get a new style of shield. One other question would be does the mega have a sufficient amount of memory more than the Uno for SRAM that it would make a difference for a solid grouping of text for multiple strings in a program?

Thanks for posting this. That is a great reference to keep on hand.

This is a site which gives you pin-out of the various Arduino boards.

http://www.pighixxx.com/test

The "tripple x" in the site address does not mean it is a porn site except to show you the nakedness of the pins.
Hope it was of help.
Regards

thank you

Hi,

I am wondering which pin is for DAC.

Thanks

I2C DAC? SPI DAC? Parallel interface DAC?
Atmega2560 itself does not have a DAC.

CrossRoads:
I2C DAC? SPI DAC? Parallel interface DAC?
Atmega2560 itself does not have a DAC.

Hi,

Could you tell me how to convert PWM to Analog if it is possible?

Thanks

Run it thru an RC lowpass filter.
Here's PWM, from 0-25-50-75-100-125-150-175-200-225-250 with 10K resistor and 4.7uF cap.
Or may 4.7K resistor and 10uF cap, I forget which.
http://sim.okawa-denshi.jp/en/CRlowkeisan.htm

You may want different values depending on what frequency response you want to achieve.

CrossRoads:
Run it thru an RC lowpass filter.
Here's PWM, from 0-25-50-75-100-125-150-175-200-225-250 with 10K resistor and 4.7uF cap.
Or may 4.7K resistor and 10uF cap, I forget which.
RC Low-pass Filter Design Tool

You may want different values depending on what frequency response you want to achieve.

Thanks a lot.

Nantonos: just add table with your image :wink:

An other table :

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

Another version of schematic for ArduinoMEGA.

ArduinoMEGASchematic.doc (865 KB)

There is no attachment GolamMostafa.

Nantonos:
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]

Nantonos:
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

Nantonos:
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!

beddy:
Nantonos: just add table with your image :wink:

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?