说明：  串行E2PROM是基于I2C-BUS 的存储器件，遵循二线制协议，由于其具有接口方便，体积小，数据掉电不丢失等特点，在仪器仪表及工业自动化控制中得到大量的应用。随着世界上各公司对该器件的开发，市场上推出了许多牌号的24C02器件，甚至还有一些冒牌的24C02器件，这样就使批量生产的单片机控制系统的质量出现时好时坏的问题。笔者经过大量的设计实践和试验摸索找出了24C02在应用中之所以出现数据被冲掉的原因，并总结了一套保护24C02数据安全的软硬件设计方法。
(Serial E2PROM is a storage device based on I2C-BUS. It follows a second-line protocol. Because of its convenient interface, small size, and data loss, it has been widely used in instrumentation and industrial automation control. With the development of the device by companies around the world, many brands of 24C02 devices have been introduced on the market, and even some counterfeit 24C02 devices have been introduced, which has caused the quality of mass-produced single-chip control systems to be bad and bad. After a lot of design practices and experiments, the author finds out the reason why 24C02 data is washed out in the application, and summarizes a set of software and hardware design methods to protect the security of 24C02 data.)