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I'll just treat the JTAG port as if it's always a JTAG port then, and double-up the JTAG connections to spare IO (which I have heaps of) and be done with it - easy!
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???
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If JTAG can't be reenabled easily I won't bother disabling it.
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Unselect the "Enable JTAG BST support" option in "Device and Pin Options/General Tab". Then the four JTAG pins are available for assignment as general I/O.
I agree, that the description of this feature in the device hardware manual isn't particularly clear. I didn't try it yet, but it's obvious to me, that the JTAG functionality can't be re-enabled with standard low voltage levels, otherwise the usability of the respective I/O pins would be restricted.
Honored Contributor
