EED0 signal state at power up

"Massimo Piovera" <[email protected]>
Newsgroups gmane.comp.hardware.microcontrollers.tini
Message-ID <000701c3f78e$64ed0ee0$2b00a8c0@ws19>
Hi all,

I'm testing tini1.0f and tini1.12.
I have a question about the status of DTR signal (EED0 pin 72) usable
for DTR of serial1.
At power up the EED0 signal level is 0V and remain in this state until
someone don't set it in a different state through a program (this is for
both tini1.0f and tini1.12).
This power up level is the same of that sets by SerialPort.setDTR(true)
method.
For hardwares which uses the DTR signal to enable the transmission of data
on serial (like RS485 line) using SerialPort.setDTR(true), this power up
condition may produce some bad effect like the block of the RS485 line.
Is it possible to change the state of this signal at power up ?
I wait for replies from all people that have made an hardware with TINI and
that uses the DTR like me, about how to avoid the problem.

Thanks
Massimo Piovera
ELSIST Srl





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