The invention discloses an
EEPROM programming precision correction circuit and method. The
EEPROM programming precision correction circuit comprises a single polycrystalline
EEPROM sub-circuit, a reset sub-circuit, an operation instruction control sub-circuit, a
signal input sub-circuit and a
charge pump. The reset sub-circuit is used for detecting whether the EEPROM is in a
chip test mode or not;in the test mode, the reset
signal of the reset sub-circuit is effective; the reset sub-circuit generates a reset
signal to the single polycrystalline EEPROM sub-circuit, the operation instruction control sub-circuit, the signal input sub-circuit and the
charge pump, and the single polycrystalline EEPROM sub-circuit, the operation instruction control sub-circuit, the signal input sub-circuit andthe
charge pump enter an initialization state and do not act; and if no reset signal comes, when the test enable signal is at a high level, an operation control instruction is generated by inputting different numbers of square
waves to the CS
chip selection end of the operation instruction control sub-circuit. According to the invention, the EEPROM memory is tested, adjusted and repaired through the combination of pin
multiplexing and single polycrystalline EEPROM, the cost is low, and the reference source
voltage can be flexibly and accurately adjusted at the same time.