Download PIC18F2220 Datasheet PDF
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PIC18F2220 Description

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.