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Thread: how to check rs232 DTR pin.
www.piclist.com/techref/io/serials.htm?key=rs232
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face BY : Wagner Lipnharski email (remove spam text)



Wagner Lipnharski wrote:
[snip] oops, correcting:
>
> DTR or any other RS232 circuit is NOT open drain, all of them are drivers
> for positive and negative voltages.

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Wagner Lipnharski - UST Research Inc
Orlando FLorida - USA - http://www.ustr.net
/_/_/_/ Atmel AVR Consultant /_/_/_/

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