GPIO P1 and P6

[KZL]

Hello,

I have 2 question about GPIO Headers !

It's possible without danger to connect GPIO P1 and GPIO P6 ?
http://elinux.org/RPi_Low-level_peripherals#cite_note-1
(no connection between 5V,3V3 and GND of course !)

And second question, how many mA is used between GPIO P6-1 and P6-2 when we connect them ? I want to connect a transistor commanded by a GPIO output and I need to know the intensity "Ic" to calculate the resistor of my GPIO output.

Thank you !

[jojopi]

The pull-up resistor on the reset line is 10kΩ, so the steady-state current when shorted will be 0.33mA. There is a 100nF capacitor to ground, so the instantaneous current may be higher, but the total energy in the capacitor is only 0.55µJ.

The square pad (P6-1) is the active low reset line, and the round pad (P6-2) is ground. Yes, it is electrically safe to connect P6-1 to a GPIO and drive it low. But there are much better ways to programmatically reboot.

[KZL]

Indeed there is easier ! Thank for answers.
I have another question. How many voltage need a input to commute for example, P6 must be 3,3V to commute, but it does commute with only 3V or lower ?
(I have no eletrical materiel to work at home ! sorry.. otherwise i shall not ask !)

[pluggy]

Commute isn't a word we'd use for voltage changes usually but the changeover voltage from logic 0 to logic 1 (low to high) usually occurs at around the half way point. You can safely assume that 2 volts or more is logic 1 (high) and 1 volt or less is logic 0 (low).