security. The widespread availability of devices and systems with USB and SD card interfaces leaves sensitive data vulnerable to data theft and malicious viruses. Accidental data loss and virus uploads have been under the microscope in the government and commercial sector for some years. In response, some governments and corporations have banned the use of consumer memory devices to decrease security risks. Long-term availability for the life of the system is another
key issue to be factored in when choosing memory devices. Consumer memory is driven by the consumer electronics market and therefore subject to short product life cycles and frequent obsolescence. Traffic light controllers are an example of long- lasting OEM designs that need a portable memory solution offering long- term availability. In these applications,
technicians use portable memory to upload setup parameters to the controllers. These important pieces of transportation infrastructure are fielded for a decade or more, so a consumer-based memory device would likely become obsolete over the life of the controllers. The inability to meet
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demands for rugged construction, a high mating cycle life, secure form factors or long-term availability best illustrate why consumer memory devices should not be used in embedded designs. As a result, OEM portable memory was developed in
response to the unmet needs of many embedded systems. These devices provide the rugged construction, high mating cycle life, secure form factors and long-term availability that average commercial memory products do not deliver. Some manufacturers of portable memory produce
‘industrial’ versions of consumer memory products, such as industrial CompactFlash cards or industrial SD cards. These so-called ‘industrial’ devices may offer an extended temperature range, use slightly more robust materials and support a higher number of write cycles. However, they still share the drawbacks associated with consumer memory devices. They are non-robust, they use low-cycle-life connectors and non-secure form factors; they come hand in hand with potential obsolescence issues and they lack harsh environment ratings.
What is OEM portable memory?
For the purpose of this guide, true OEM portable memory devices are defined as purpose-built systems that provide unique form factors for controlled availability, and baseline physical security. OEM portable memory is most accurately
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Fig. 3. Former Vodafone and Samsung marketing expert, Victoria Barrett has jooined Nexus GB, the UK partner of memory specialist Datakey Electonics, as director of technical PR and marketing.
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