EEPROM programming precision correction circuit and method

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of memory precision correction, in particular to an EEPROM memory programming precision correction circuit and method. Background technique [0002] Electrically Erasable Programmable Memory (EEPROM) is one of the most widely used memory elements today. Because it can rewrite the content at any time like RAM, and can store information for a long time like other ROMs, it has been widely used in microcomputers, micro-control circuits and gold card (IC card) projects. In the design and manufacture of integrated circuits, due to the design process and packaging, there is a certain gap between the actual manufacturing and the theory. With the improvement of integrated circuit integration, the high precision requirements of integrated circuits are becoming more and more obvious. Accuracy calibration is to achieve high precision integration. Necessary means of the circuit. [0003] Traditional EEPROM precision co...

AI Technical Summary

Problems solved by technology

However, the laser trimming cost is high and the process is complicated; the fuse burnout trimming error is large and the yield is low; the diode trimming technology occupies a large chip area and is a one-way trimming

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