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Topic: Mini Documentation Error? (Read 706 times) previous topic - next topic

John Abshier

The documentation says that you need to tie the reset pin high and then pull it low to reset.  But the schematic shows the reset pin being pulled high on the board.  If I had things wired up correctly, I believe the schematic, not the words.

mem

#1
Oct 23, 2008, 01:37 am Last Edit: Oct 23, 2008, 01:38 am by mem Reason: 1
Hi John, all the Arduino/freeduino schematics I have seen have the reset pin connected through a 10k resistor to +5v with a switch pulling the reset pin to ground.

That sounds to me what the documentation is saying

John Abshier

On this page http://arduino.cc/en/Guide/ArduinoMini
it says
If you leave the reset pin unconnected, the Arduino Mini will reset randomly.
This implies the reset pin is not pulled up.

In the playground http://www.arduino.cc/playground/Learning/ArduinoMini
it says
ALSO connect the reset pin through a large (10k ohm) resistance to +5v.
which also implies that reset is not pulled up.

John Abshier

mem

If you have a mini and a multimeter you could check if the reset pin is +5v without an external resistor connected.

wayoda

Hi John,
Quote

The documentation says that you need to tie the reset pin high and then pull it low to reset.  But the schematic shows the reset pin being pulled high on the board.  If I had things wired up correctly, I believe the schematic, not the words.

This short article here explains why the words actually match the schematic:
http://en.wikipedia.org/wiki/Pull-up_resistor

Eberhard

mem

Thanks Eberhard, but the words in post#2 above implies that a pull-up is not connected, yet the schematic does show a pull-up. If the schematic is correct then words should be changed.

wayoda

Quote

...but the words in post#2 above implies that a pull-up is not connected, yet the schematic does show a pull-up. If the schematic is correct then words should be changed.

You are right, I didn't follow the links in post#2
John is also right, on page
http://arduino.cc/en/Guide/ArduinoMini
it sounds like the pull-up resistor is not on the board.

Anyone (John?) to confirm the pull-up resistor actually is on the Mini? I only dealt with plain NG boards so far.

I sent a mail to te developers list, to have someone look at this thread and fix the error.

Eberhard



 

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