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PIC18F2220/2320/4220/4320 Data Sheet
28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
2003 Microchip Technology Inc.
DS39599C
Note the following details of the code protection feature on Microchip devices: Microchip products meet the specification contained in their particula...