ECE 424 Embedded Systems
Design
Lecture 2: Attributes of Embedded SystemsNow
Ning Weng
ECE 424 2
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
Ning Weng
ECE 424 3
Technology Trends• Computation• Connectivity• Storage • Sensing
Ning Weng
ECE 424 4
Computation: Morre’s Law
Ning Weng
ECE 424 5
Connectivity: Bandwidth
Ning Weng
Global BW Wireless BW by Applications
ECE 424 6
Unit for BW• Gigabyte : GB, power of 9• Terabyte: TB, power of 12• Petabyte: PB, power of 15• Exabyte: EB: power of 18
Ning Weng
ECE 424 7
Connectivity: Devices & Cost
Ning Weng
Interne of Things: 1 Trillion year 2013, most of them are embeddedInternet access cost: fairly stable though BW rate increasing
ECE 424 8
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
Ning Weng
ECE 424 9
Issues• Energy• Security• Health
Ning Weng
ECE 424 10
Energy
Ning Weng
ECE 424 11
Security• Reasons: Information value and inexpensive to
duplicate, store and transfer• Attacks: Malicious and misuse
Ning Weng
Courtesy of Trusted Computing Group
ECE 424 12
Challenges and Uncertainties
• Open systems─ Close system slow the innovation
• Internet Access• Net Neutrality• Privacy• Successful commercialization
Ning Weng
Ning Weng ECE 424 13
For Next Class• Get textbook• Read Chapter 13 for Qt App. framework