ECE 424 Embedded Systems Design Lecture 2: Attributes of Embedded Systems Now Ning Weng.

ECE 424 Embedded Systems

Design

Lecture 2: Attributes of Embedded SystemsNow

Ning Weng

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ES Future LandscapeWe know what now, let us look forward

• Technology trends

• Issues, applications and initiatives

• Challenges and uncertainties─ Nontechnical but likely substantial impact on ES

Prepare not Simply predict

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Technology Trends• Computation• Connectivity• Storage • Sensing

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Computation: Morre’s Law

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Connectivity: Bandwidth

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Global BW Wireless BW by Applications

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Unit for BW• Gigabyte : GB, power of 9• Terabyte: TB, power of 12• Petabyte: PB, power of 15• Exabyte: EB: power of 18

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Connectivity: Devices & Cost

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Interne of Things: 1 Trillion year 2013, most of them are embeddedInternet access cost: fairly stable though BW rate increasing

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Storage• Nonvolatile memory

─ Magnetic hard disk drive• Cost per unit storage halves per 15 months• Motors: slower in orders of magnitude than electronic

─ Flash memory• CMOS tecnology• Up to 10 GV, good for embedded devices

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Issues• Energy• Security• Health

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Energy

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Security• Reasons: Information value and inexpensive to

duplicate, store and transfer• Attacks: Malicious and misuse

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Courtesy of Trusted Computing Group

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Challenges and Uncertainties

• Open systems─ Close system slow the innovation

• Internet Access• Net Neutrality• Privacy• Successful commercialization

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Ning Weng ECE 424 13

For Next Class• Get textbook• Read Chapter 13 for Qt App. framework