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Embedded apps demand data logging

Posted: 23 Feb 2010     Print Version  Bookmark and Share

Keywords:data logging  automatic storage  secure memory 

Demand for automatic storage of system data is increasing in embedded applications. This is driven by system manufacturers and final users for traceability and security, and by some country local regulation for many quality-critical areas like transportation or food and drugs supply chain.

A dedicated non-volatile memory (NVM) is required for stand-alone data logging devices, but is also common to see a dedicated memory for data logging in complex systems that already have on-board a huge amount of NVM like HDD. This architectural choice is related to security, reliability and independent accessibility, in case of main system default. The right selection of this NVM support can be the critical success factor for data logging applications.

Data logging applications are becoming ubiquitous. They include black box-like tools, access control applications, secure memory support for pay per use business approach, wireless sensor networks, other industrial applications, consumer electronics, PC and peripherals, and GPS systems.

The selected non-volatile support depends on the data logging characteristics of the specific application; the first key parameter driving the selection of the right memory media is the density.

Size of the data, frequency and total period of data storage drive the density requirements.

On top of good electrical performances, SPI solutions bring memory size scalability and low pin number that simplify the board routing (or bonding for multi-chip solutions), decrease the total system cost and enable very compact solutions.

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