pin C.6 in only?

[ac21]

Note pin C.6 is input only on the 20M2 and 20X2 parts.

what can it input?

 

[tony_g]

that would be a general logic high or logic low input signal, e.g "if pinc.6=1" or "if pinc.6=0"


tony

 

[erco]

I typically use it on small bots for IR input from a 38 kHz receiver for Sony codes. IIRC someone here posted a clever way to make it an output by controlling an external FET with the pin's controllable pullup resistor.

 

[westaust55]

If using the SERIN command on C.6 for a 20 pin device also consider the note in the command documentation.
See bottom of page here:
http://www.picaxe.com/BASIC-Commands/Serial-RS232-Interfacing/serin/

 

[erco]

EXCELLENT call, westaust55! I had not noticed the external diode requirement previously.

All 8 and 14 pin chips: Due to the internal structure of input3 (C.3) on these chips, a 1N4148 diode is required between the pin and V+ for serin to work on this particular pin ('bar' end of diode to V+) with this circuit. All other pins have an internal diode.

All 20 pin chips: Due to the internal structure of input6 (C.6) on this chip, a 1N4148 diode is required between the pin and V+ for serin to work on this particular pin ('bar' end of diode to V+) with this circuit. All other pins have an internal diode.