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The limiting factor is the size of program memory (and data EEPROM) for the device you are using. The PIC16F877 has 8K of program words and 256 bytes of EEPROM. The hex file uses 2 bytes to represent a program word so the largest hex file would be have 16K bytes of program 256 bytes of data and probably 1 byte of config. The file's physical size will be slightly larger due to additional information that the hex file format uses.


what is the limit size of the hex file that i can load to my microcontroller? let say, for pic16f877a?

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