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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.
From: email@example.com">mailto:firstname.lastname@example.org] On
Behalf Of Dave Matlock
Sent: Wednesday, January 28, 2004 3:58 PM
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.