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SECTION II-4: General Purpose Registers RAM Vs EEPROM in PIC micro-controller

There are two RAM columns in the chip information section of the Microchip website. One refers to the general purpose registers GP RAM size, and the other is the EEPROM size. GP RAM, which constitutes most of the file register, must not be confused with the EEPROM data memory. The GPRs are used by the CPU for internal data storage, whereas the EEPROMs are considered as an add-on memory that one can also add externally to the chip. Many PIC chips have zero bytes of EEPROM data, it is impossible for a micro-controller to have zero size for the file register. The microchip website provides tha data RAM size, which is the same as GPR size.

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