TS-73X0 Errata xuartgpio

From Technologic Systems Manuals
Synopsis PC/104 XUART pins cannot be used as GPIO
Severity Minor
Class FPGA bug
Affected TS-7350/70 All FPGA Revs
Status No workarounds available

Description:

The two XUARTs on PC/104 pins A12, A15, A18, and A19 are unavailable as GPIO pins and are always XUART pins if the PC/104 bus is in GPIO mode, `pc104off`. If the PC/104 bus is in PC/104 mode, `pc104on`, then these pins will be used in their PC/104 modes and not available as XUART. This is not considered a bug at this point in time.