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RE: RS-422 Port as GPIO



The RS-422 uses asynchronous serial port 3. If this serial port 
is disabled in kernel configuration the pins are accessible as 
gpio at bit 30 and 31 in R_PORT_G_DATA. Refer to section 20.9.3 
(page 12) in the Electrical Information PDF.

Regards
/Mikael

-----Original Message-----
From: owner-dev-etrax@xxxxxxx.com">mailto:owner-dev-etrax@xxxxxxx.com] On
Behalf Of Dave Matlock
Sent: Wednesday, January 28, 2004 3:58 PM
To: dev-etrax
Subject: RS-422 Port as GPIO


Is there any way to use any of the RS-422 pins as GPIO pins?  According
to the circuit diagram for the port, pins 1-4 are AC/GND and 5-8 are
RX/TX.  Can I access those RX/TX pins directly?  I can't seem to find
the information in the Electrical Information PDF.