说明：  c8051f单片机支持软件读写flash操作例程与相关资料，使得能过无需外接eeprom等存储器，就能保存非易失性数据（掉电不丢失的数据）。
(c8051f MCU support software routines to read and write flash operation with relevant information, It would make no such external eeprom memory, we will be able to preserve nonvolatile data (power-fail without loss of data).)