Primary air system microcontroller and data access method thereof

The invention discloses a primary air system microcontroller data access method suitable for being executed in a primary air system microcontroller. The primary air system microcontroller data access method includes the following steps of the initialization step, wherein on-chip FLASH is initialized; the definition step, wherein a structural body is used for defining variable data to form a structural body array; the write-in step, wherein a 'write-in' function is used, the structural body array is written in and stored in the on-chip FLASH; the step of locking, wherein the FLASH is locked, and the data is stored. According to the primary air system microcontroller and the data access method thereof, the variable data can be defined into the structural body array, the structural body array is stored in a non-volatile memory device namely the on-chip FLASH, and the on-chip FLASH is low in cost, small in occupation space of a PCB and high in data storage speed; compared with the mode of repeated and successive single data access in the FLASH, the limit access defects of the FLASH are overcome by adopting the structural body array, the service life of the on-chip FLASH is prolonged, and the durability of the on-chip FLASH is improved.