Pin RA4 is multiplexed with the Timer0 module clock input to become the RA4/T0CKI pin. The RA4/T0CKI pin is a Schmitt Trigger input and an open drain output.

I cannot determine by the data sheet, if the peripheral is enabled by default, and if so, how to disable. This being figured out, will the above description support the desired function, that is open drain output to serout an LCD command?