AT27BV256-90RC

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Memory as an important part of electronic device plays an increasingly significant role with the development of electronic technology. AT27BV256-90RC, as one type of memory, serves as a reference for many users. In the following, application field and working principle of AT27BV256-90RC are discussed.

AT27BV256-90RC, referred to as AT27BV, is one serial of low-power EEPROM (Electrically Erasable Programmable Read-Only Memory) produced by Atmel, an American manufacturer devoted to the production of semi-conductors. AT27BV has a crucial position in the market of EEPROM because its structures and functions comply with the requirements of maximally customers. It is commonly used in many applications such as automotive, aviation and so on.

AT27BV has the following features. Firstly, the micro-power consumption technology applied to it contributes to be operated with the voltage between 1.8V and 5.5V, which greatly extend the voltage range and provide more flexibility in its application. Secondly, AT27BV also has advanced features of small size, high security and large capacity. Thirdly, Atmel provides a great deal of software to design the data by using I²C programming interface.

In addition, it works in the following way. In reads and writes operation, AT27BV sends out an 8-bit instruction code, upper 6 bits of which is the instruction and the rest 2 bits are the instruction number. Then, it will respond to the instruction by either writing the data or sending out the data byte. In erasing operation, the instruction to erase all the data or parts of it should be sent out. No matter read or write operation, AT27BV will factor in authentication code. The authentication code depending on each device is necessary to ensure both the data and the write and erasing process during operation.

To sum up, AT27BV256-90RC, as one serial of EEPROM, has its outstanding performance and can be flexibly used in different places. Its application fields vary from automotive to aviation, and its working principle is worth study.

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