baeg, sanghyeon reliable & high speed computing lab. hanyang university

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Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

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Page 1: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Baeg, SanghyeonReliable & high Speed Computing Lab.

Hanyang University

Page 2: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University
Page 3: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University
Page 4: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

External MemoryExternal Memory

SensorsSensorsMicro Controller

Micro Controller

Communication

device

Communication

device

Power SourcePower Source

Page 5: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Energy is typically more limited in sensor Energy is typically more limited in sensor networks than in other wireless networks networks than in other wireless networks because of the nature of the sensing devices because of the nature of the sensing devices and the difficulty in recharging their power and the difficulty in recharging their power sources.sources.

Power consumption in the sensor node is Power consumption in the sensor node is for the Sensing, Communication and for the Sensing, Communication and Data Data Processing.Processing. Ex) monitoring or at detecting phenomena. Ex) monitoring or at detecting phenomena.

Examples include office building Examples include office building environment control, wild-life habitat environment control, wild-life habitat monitoring, etc.monitoring, etc.

Page 6: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

More energy is typically required for More energy is typically required for data communication in sensor node. data communication in sensor node. Energy expenditure is less for sensing Energy expenditure is less for sensing and data processing.and data processing. The energy cost of transmitting 1 Kb a The energy cost of transmitting 1 Kb a

distancedistance of 100 m is approximately the same as that of 100 m is approximately the same as that for for the executing 3 million instructions by 100 the executing 3 million instructions by 100 million million instructions per second/W processorinstructions per second/W processorLOW

POWER!!

Page 7: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

IC should perform in accordance with IC should perform in accordance with expectations for a predetermined expectations for a predetermined period.period.

Sudden death of sensor nodes cost Sudden death of sensor nodes cost replacing and management efforts.replacing and management efforts.

Sensor nodes are typically exposed to Sensor nodes are typically exposed to extreme environmental situations such extreme environmental situations such as temperature changes, weathers, as temperature changes, weathers, animals.animals.

Page 8: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Mission critical sensor nodes needs high Mission critical sensor nodes needs high probability of surviving through self-probability of surviving through self-guarding/guarding/diagnosis features.diagnosis features.

RELIABILITY!!

Page 9: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Power reduction for memories used in Power reduction for memories used in sensor networksensor network

Page 10: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Research for cross talks in memory Research for cross talks in memory cellscells Increasing memory density and

decreasing technology geometry Increasing capacitive cross talks

Reduced reliability because of additional power consumption and noise paths Becomes the source of intermittent failure Crosstalk in marginal size is not detected by normal test Increasing costs for test Test method using negative voltage stress Testable method with low cost

Page 11: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Analysis for High-speed Interface IssuesAnalysis for High-speed Interface Issues

Page 12: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Chip Schematic & Test ResultChip Schematic & Test Result

Page 13: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Micro Processor(8051) as underlying uPMicro Processor(8051) as underlying uP Implement Processor in FPGA as initial stage with Implement Processor in FPGA as initial stage with

reduced instruction for power savingreduced instruction for power saving

FPGA

MC8051_ALU

SIU

TMRCTR

TMRCTR

SIU

CONTROL

RAM(128X8)

ROM(64KX8)

RAM(64KX8)

Page 14: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Customized IP Design is beneficial in low power design by Customized IP Design is beneficial in low power design by reducing unnecessary capacitance in design.reducing unnecessary capacitance in design.

Page 15: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Equipment for development and testingEquipment for development and testing

Logic AnalyzerFunction GeneratorBER TesterOscilloscopePower Supply

Logic AnalyzerFunction GeneratorBER TesterOscilloscopePower Supply

FPGA Board

for Development & Testing

FPGA Board

for Development & Testing

Page 16: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

Chip Test

Board(Interconnection

Testing Board)

Chip Test

Board(Interconnection

Testing Board)

Memory Test BoardMemory Test Board

Page 17: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

In the second year of sensor hardware In the second year of sensor hardware nodesnodes

Focused on development in low power Focused on development in low power and reliable sensor node systemand reliable sensor node system

Currently focusing on IP developmentCurrently focusing on IP development Will be moving to FPGA system Will be moving to FPGA system

developmentdevelopment Eventually, single chip solutionEventually, single chip solution

Page 18: Baeg, Sanghyeon Reliable & high Speed Computing Lab. Hanyang University

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