PC28F128P33T85A

Memory

With the rapid development of digital technology, memories in fields involving MCU, DSP or communication systems are essential for temporary data storage and coding. PC28F128P33T85A is a type of memory which is longlife, with its numerous advantages and advantages, it is widely used in these areas.

Application field

PC28F128P33T85A is a type of block Pseudo-SRAM, moreover its die architecture is equipped with 128K * 8 bits. With its commercial grade performance and three times of read/write speed compare to the traditional SRAM, it is highly suitable for automotive, industrial and communications system. In automotive area, it\'s used for automatic cruise control systems, in industrial field it works as industrial automation support, and in communication system, it’s used for several kinds of aperture networks. Due to its high speed memory read/write feature, data recording or secure storage is achievable.

Moreover, PC28F128P33T85A has 119.8 millisecond retention time which is appropriate for data storage in nasty applications. Of course, with its power supply range from 1.7V to 3.6V, it is able to adapts to fluctuating temperatures and environments, and maintaining a good performance state.

Working principle

PC28F128P33T85A is based on Pseudo-SRAM architecture, along with its highspeed read/write speed, it presents fast data read and write features, as one of the advantages of 60ns access time. Along with its internal asynchronous interface and 100Mhz data rate, data broadcast is achieved.

The Pseudo-SRAM architecture of PC28F128P33T85A is composed of two main sections: Controller and Flash. All data read and write interface between controller and flash is through the internal asynchronous interface. As for data write process, first it will store in SRAM, then the controller logic unit will write data into flash, finally the data in SRAM will be erased.

In data read procedure, after the logic unit send an instruction to the controller, not only will the controller and logic unit exchange data, at the meantime both of them will access the flash.

The way of communication between controller and flash is done through a address/data bus, when the controller written the data into flash, the logic unit and flash will not communicate, only the controller and flash will communicate.