Current totals follow the current allowed by the different ports.
Although each I/O port can sink more than the test conditions (20mA at VCC = 5V, 10mA at VCC = 3V) under steady state
conditions (non-transient), the following must be observed:
ATmega640/1280/2560:
1.)The sum of all IOL, for ports J0-J7, A0-A7, G2 should not exceed 200 mA.
2.)The sum of all IOL, for ports C0-C7, G0-G1, D0-D7, L0-L7 should not exceed 200 mA.
3.)The sum of all IOL, for ports G3-G4, B0-B7, H0-B7 should not exceed 200 mA.
4.)The sum of all IOL, for ports E0-E7, G5 should not exceed 100 mA.
5.)The sum of all IOL, for ports F0-F7, K0-K7 should not exceed 100 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test condition.
That totals 800mA. There is nothing that says if you draw 200mA in one group that you then can't draw it in another.
So this thinking of only 200mA total is nonsense.
That totals 800mA. There is nothing that says if you draw 200mA in one group that you then can't draw it in another.
So this thinking of only 200mA total is nonsense.
LOL, we've had this same discussion before.
There is nothing that says if you draw 200mA in one group that you then can't draw it in another.
There is also nothing stating that you can take the sum, of all those individual port limits, as the maxiumum chip current draw limit. And no where in the datasheet does it state that 800 ma of total current draw is allowed. And of course as I've stated before the absolute maximum section lists the 200 ma figure. Why would they state 200ma there if it only applied to one port? Your assumption, and it is just an assumption, is in error, IMHO.
But that is why I would like others to comment on the subject, as you and I. while still respectful of each other's opinion, have not been able to come to consensus on the matter now or in the past.
I Love your work and the help you give us !!! Thank you
May I would suggest to add the PIN numbers as they are printed on the PCB (you did this on the UNO Reference), this would be easier to use if you don´t screw your Arduino to the printout
For some reason, clicking on the download link takes me to a 404 page on your website (non existent) ... I'm assuming you've been moving things around on your site? The same thing is happening with the Uno thread. Specifically I'm looking at larger format (or formats that will scale well), in English.