3 Operating Environment MPLAB X v6.20 or later MPLAB® XC Compilers XC8 v2.46 or later GCC Compilers for AVR AVR 8-Bit Toolchain v3.7.0 or later AVR-GCC v7.3.0 or later MCC Plugin v5.5.1 or later MCC Core v5.7.1 or later Melody Core v2.7.1 or later
