Storage device of large capacity nonvolatibitity alarming data

Abstract

This invention relates to a large volume nonvolatile alarm data storage device including a microcontroller, a nonvolatile RAM storage, a FLASH storage, a CMOS low power loss linear regulator and an interface, in which, the FLASH storage and the nonvolatile RAM storage are combined to store the alarm data, the microcontroller controls the read and write of the two storages and receives the alarm data via the serial interface or receives instructions to output the alarm historical records advantaged that the FLASH is taken as the primary storage to store large volumes of historical data and the nonvolatile RAM storage is used to buffer alarm data without limit of writing times to reduce the writing times of the FLASH storage and increase the life time of the device.

Description

technical field [0001] The invention belongs to the field of fire protection and relates to a large-capacity non-volatile alarm data storage device. Background technique [0002] At present, there are mainly three methods for non-volatile storage of data using integrated circuit technology: non-volatile RAM, FLASH and EEPROM. Since the alarm data of the fire protection system generally has the characteristics of suddenness, discontinuity, and small amount of single alarm data, and in order to facilitate analysis and statistics, there are also requirements for the capacity of storing alarm history data. However, in the above three storage methods Among them, non-volatile RAM has the characteristics of fast writing speed and no limit on the number of write times, but the disadvantage is that the capacity is relatively small; while FLASH has the characteristics of large capacity, but it adopts a paging structure and has a limit on the number of write times , the length of each...

AI Technical Summary

Problems solved by technology

Since the alarm data of the fire protection system generally has the characteristics of suddenness, discontinuity, and small amount of single alarm data, and in order to facilitate analysis and statistics, there are also requirements for the capacity of storing alarm history data. However, in the above three storage methods Among them, non-volatile RAM has the characteristics of fast writing speed and no limit on the number of write times, but the disadvantage is that the capacity is relatively small; while FLASH has the characteristics of large capacity, but it adopts a paging structure and has a limit on the number of write times , the length of each page of data is much larger than the length of a single alarm data in the alarm system, direct use will cause the entire page of alarm data to be written multiple times, affecting life and reliability; in addition, although EEPROM can be written in bytes, but There is also a limit on the number of writes, and the capacity is small

Therefore, any one of the above three storage methods alone cannot meet the requirements for storing alarm history data

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