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Data acquisition, storage and transmission are mandatory requirements for different applications in the area of smart sensors and sensor networks. Different architectures and scenarios can be considered. Thus for smart sensors architectures (Frank, 2002) based on the IEEE1451.X standard (IEEE, 2007) the acquired data can be processed at the smart sensor level using data of the so-called standard template TEDS (Honeywell, 2009) stored in a non-volatile memory (Brewer & Gill, 2008). The autoidentification of the smart sensor (Yurish & Gomes, 2003) unit from a sensor network is based on the Basic TEDS that also represents part of the stored information. Considering smart sensor architectures (Song & Lee, 2008), the communication between the sensor processing unit (e.g. microcontroller) and one or multiple non-volatile memory units (e.g. Flash EEPROM memory units) is done using different communication protocols, such as SPI, I2C, 1-wire (Kalinsky & Kalinsky, 2002); (Paret & Fenger, 1997); (Linke, 2008). These protocols are thus frequently used in smart sensor implementations (IEEE, 2004)(Ramos et al., 2004). As the name implies, smart sensors networks are networks of smart sensors, that is, of devices that have an inbuilt ability to sense information, process the information and send selected information to an external receiver (including to other sensors). A "smart sensor" is a transducer (or actuator) that provides functions beyond what is necessary to generate a correct representation of a sensed or controlled quantity. This means that such nodes require memory capabilities to store data temporarily or permanently. In an increasingly number of applications, the nodes are required to change their spatial position (mobile nodes), which leads to wireless networks. The sensor network nodes data management and advanced data processing are carried out by a host unit characterized by high data processing capabilities, non-volatile data storage capabilities and data communication capabilities. One kind of solutions that materialize the host unit is mobile devices (e.g. phones and PDAs) with special operating systems (e.g. WindowsCE, Symbian, BalckBerry OS) and internal and extended data storage memory capabilities (CF card memory, SD card memory). Specific protocols, CompactFlash and Secure-Digital (Compact Flash, 2009) (SD Association, 2009) are associated with memory card interfaces that are used to perform the communication between the host unit processor and the memory units. In wireless sensors networks, special attention is granted to the memory read/write operations 10

Non-Volatile Memory Interface Protocols for Smart Sensor Networks and Mobile Devices