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1f0d15cc80
NXP put "R" as the first name of some pins, e.g., R/PIO1_2/AD3/CT32B1_MAT This is meant to indicate that it may have a possible extra function which doesn't exist in the present implementation. The whole concept seems bogus. First of all, there are several pins with supposedly different roles but all with a common name. Second, one isn't even supposed to set the pin configuration register to a value selecting this "reserved" function. Third, there are several other pins that also have unused codepoints in their function settings, e.g., PIO0_3 or PIO0_4/SCL but there's no "R" in evidence there. So that "R" doesnt seem to make any sense, may cause confusion, and makes the symbol more crowded.