Atmega328p short wire test

[solrol]

this is not happened in real experiment, D0 and D1 aren't High.............. it's make me angry!

[David]

Hi,

Please send your project in to support@labcenter.com Thanks.

Regards,
Dave.

[Ettore]

this is not happened in real experiment, D0 and D1 aren't High.............. it's make me angry!

I believe there's nothing wrong with Proteus results. By a quick theoretical analysis and applying Kirchhoff's laws to the currents flowing in to the nodes and by considering output resistances of any I/O Port pin equal to 20 Ohms, then the voltage at the short wire (pins 12 and 13 shorted and both to high state) should be in the range of +1.8V. Because of the Mixed Mode Modelling mechanism implemented with Proteus, all voltages below 0.8V are coloured with blue, all voltages above 2.5V with red and finally voltages between 0.8V and 2.5V are coloured with grey. This explains why that node is grey coloured.

In the real circuit and based to the real output resistance values you may have different voltages at the short node but you likely will have values between 1.7V to 2.4V.