AT45DB021E-SHN-B

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AT45DB021E-SHN-B Application Field and Working Principle

Introduction

AT45DB021E-SHN-B is a kind of serial flash memorizer used in embedded system. It is highly integrated with Advanced Sector Protection (ASP), Total Endurance Cycle, and Data Retention Time data storage functionality. It supports different levels of application like general embedded systems, battery-powered devices and healthcare solutions. It is a very versatile product with many applications and advantages.

Application Field

The flexible interface and excellent programming features of the AT45DB021E-SHN-B combine to offer it a wide range of application areas. It is becoming increasingly popular for use in a diverse range of embedded systems such as RTOS-based systems, micro controllers, smart cards, and digital cameras. It is an ideal solution for the communications and networking industry, offering the power efficiency and reliability that are essential for embedded systems used in this area.

Moreover, the AT45DB021E-SHN-B’s endurance for write/erase operations is much better compared to other memories. This makes it suited for medical applications, as the required lifetime of medical devices is usually much higher than that of other systems.

Working Principle

The AT45DB021E-SHN-B is a single-chip flash memory having non-volatile memory based on the industry-standard Non-Volatile Memory (NVM) architecture. It is built with a page size of 256-byte and a total of 528 bytes of storage.

This chip also has four selectable address bits and three active low chip enables that allow access to the 16 possible Sector Sizes, ranging from 64 to 4032 bytes. The device includes two embedded read controllers that are capable of sending consecutive commands with minimal latency, allowing higher performance.

The AT45DB021E-SHN-B operates using the Serial Peripheral Interface (SPI) protocol. It supports only the single-bit interface and supports the fastest SPI clock rate of 25 MHz. The device can operate from both the single 1.8 V or dual 3 V or 5 V power supplies.

The read/write operation of the AT45DB021E-SHN-B is extremely localized, as it does not need to operate as an external memory. This means that data can be read directly from the chip and no external addressing is required. This minimizes the need for programming and simplifies the design of the application.

Conclusion

The AT45DB021E-SHN-B is a highly integrated flash memories chip, making it ideal for use in a wide range of embedded applications. Its flexible interface and excellent programming capabilities are well suited for use in the communications and networking industry, as well as in medical applications due to its high endurance for write/erase operations. The device operates using the Serial Peripheral Interface (SPI) protocol, making it extremely easy to use and highly compatible with other chips.

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