참고 사이트 : https://www.keil.com/support/man/docs/c51/c51_le_memtypes.htm Memory TypeDescription code Program memory (64 KBytes); accessed by opcode MOVC @A+DPTR. data Directly addressable internal data memory; fastest access to variables (128 bytes). idata Indirectly addressable internal data memory; accessed across the full internal address space (256 bytes). bdata Bit-addressable internal data m..