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Flash Memory. The on-chip flash memory is primarily intended to hold program code and constant data. The flash memory has the following features: • Page size: 1 KB or 2 KB (details are given in the data sheet of the device.) • Flash-page erase time: 20 ms • Flash-chip (mass) erase time: 20 ms • Flash write time (4 bytes): 20 μs • Data retention (at room temperature): 100 years • Program and erase endurance: 20,000 cycles
