Disposable programmable memory controller, integrated circuit and program burning method

Abstract

The invention discloses a disposable programmable memory controller. The disposable programmable memory controller comprises an unlocking circuit, an instruction decoding circuit and a programming circuit, wherein the unlocking circuit is used for receiving a level signal and a serial data signal, and sending an unlocking signal when the level signal and the serial data signal satisfy a specific time sequence; the instruction decoding circuit is connected with the unlocking circuit, and is used for receiving an instruction code and a serial clock signal in the serial data signal and executing a decoding operation when receiving the unlocking signal; and the programming circuit is connected with the instruction decoding circuit, and is used for receiving the serial data signal and the serial clock signal according to a programming starting signal output by the instruction decoding circuit and writing data in the serial data signal into the disposable programmable memory. The invention furthermore discloses an integrated circuit and a disposable programmable memory program burning method.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a memory controller of an OTP type microcontroller chip in the field and a program programming method. Background technique [0002] OTP (One Time Programmable) one-time programmable memory, because of its cheap price, small area and reliable data storage, is widely used in 8-bit / 16-bit / 32-bit microcontroller chips to store user programs or data. When the chip leaves the factory, the content stored in the OTP is all 1, and the user can write some cells into data 0 as needed to achieve the purpose of "programming". The typical product of OTP is "bipolar fuse structure". If you want to rewrite some cells, you can pass a large enough current (high voltage programming) to these cells and maintain it for a certain period of time. The fuses related to these cells are It can be blown, so that the effect of writing some units as 1 is achieved. Since OTP data modification is realized ...

AI Technical Summary

Problems solved by technology

How to realize the program programming and testing requirements of OTP microcontroller chips, based on the OTP memory read and write timing specifications, different chip design manufacturers have different implementation methods, but in the end their chips are in the anti-interference, user data security, test There are large differences in cost and efficiency

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