PIC16LF145X Datasheet PDF - Microchip Technology

OVERVIEW
   The devices can be programmed using either the highvoltage In-Circuit Serial Programming™ (ICSP™) method or the low-voltage ICSP™ method.

   When using low-voltage ICSP™ programming (LVP = 1), the ICSPDAT/ICSPCLK functions are additionally enabled on the RA0/RA1 port pins. This legacy programming feature provides compatibility support for existing PIC18F1XK50 designs. For new designs, using the ICSPDAT/ICSPCLK functions on the RC0/RC1 port pins is recommended.