AT45DB321B-CI

Series:	--
Packaging:	Tray
Part Status:	Obsolete
Memory Type:	Non-Volatile
Memory Format:	FLASH
Technology:	FLASH
Memory Size:	32Mb (528 Bytes x 8192 pages)
Clock Frequency:	20MHz
Write Cycle Time - Word, Page:	14ms
Memory Interface:	SPI
Voltage - Supply:	2.7 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C (TC)
Mounting Type:	Surface Mount
Package / Case:	44-CBGA
Supplier Device Package:	44-CBGA (6x12)
Base Part Number:	AT45DB321

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AT45DB321B-CI Application Field and Working Principle

Memory is an important element in computer science and technology, and it plays an essential role in transmitting, storing and retrieving information. The AT45DB321B-CI is one type of memory that is used in many applications. This article will discuss the application field and working principle of the AT45DB321B-CI.The AT45DB321B-CI is an 8-megabit Flash Serial Memory with a page size of 528 bytes and a sector size of 4096 bytes. It is a double data rate page-oriented device, meaning that data can be written to it at twice the data rate of the system\'s external clock frequency. Its advanced architecture and multiple features make it ideal for memory applications such as digital video recorders, micro cameras, and other circuit boards that require high-density and high-speed data transfer.The AT45DB321B-CI is rated for operation from 1.7V to 1.95V and can operate over a temperature range of -40°C to +85°C. It is available in a 44-pin VFBGA package with a 4 x 4mm footprint and is fully compatible with industry-standard microcontrollers and processors.The AT45DB321B-CI provides the user with a wide range of features, such as: a Multi I/O Bus for enhanced data transfer, a sector-based erase operation, a program suspend and resume capability, a true "chip-erase" mode, and a no-erase write mode. The AT45DB321B-CI also supports a uniform sector erase architecture, which enables higher write performance and improved system integrity.The AT45DB321B-CI can be used in a variety of applications that require fast data transfer and high data retention times. It can be used in video recorders and video cameras, where the data transfer rate and size of the memory can be important factors. It can be used in medical instruments, where the data retention time needs to be extremely long and the data needs to be reliable. It can also be used in automotive systems, where the device might need to operate over a wide temperature range and in harsh environments.The AT45DB321B-CI is designed to operate using two main techniques - serial communication and parallel communication. In serial communication, each of the 32-bytes of memory data is clocked in two separate bytes through pins B0, B1, and B2. This allows the AT45DB321B-CI to transfer the data in blocks of 256 bytes for faster data transfer. In parallel communication, the 32-byte data is transferred in a single clock cycle.The AT45DB321B-CI also provides a built-in write protect function, which enables users to enable/disable the write protect feature. This allows the user to protect the data stored in the part against accidental overwrites.In summary, the AT45DB321B-CI is a high-performance, high-density, low-power serial memory device that is suitable for a wide range of memory applications. It features a page size of 528 bytes and a sector size of 4096 bytes, which enables high-speed data transfer. It also includes a built-in write protect function and supports serial and parallel communication. Furthermore, it is rated for operation from 1.7V to 1.95V over a temperature range of -40°C to +85°C, making it suitable for applications that may need to operate over a wide temperature range and in harsh environments.

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