Hardware Designers (VLSI) |
Embedded Technocrats |
Sasken Communications |
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Activity:
101 views;
last activity : 07 06 2010 20:18:09 +0000
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Analyze & Optimize Power
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Requirement based sizing of silicon
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Asynchronous Crore
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clock gating and multiple voltage thresholds
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Shutting power to an unused block
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power on all peripherals only when they are required.
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My take is to analyze and optimize power in everything from clock trees to I/Os. Have a balanced approach to power optimization that spans the entire RTL-to-GDS flow, and ensure that high-power areas in a design are identified and that steps to reduce power consumption are automated.....
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The current design based on clock frequency has reached its peak. It is time to think for alternative. Some of the intel chips consume 150A at 1.5V at maximum performance. These chips can serve as a room heaters in a cold climate
V.Kadal Amutham
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generally the power optimization is a tradeoff with space & performance, if you want one need to sacrifice other. so it is better to customize your product based on it's usage & need. Like some components in the entire IC may be used rarely (for some intializations & configurations etc) so these components can be reduced in size(will increase power consumption) and other for components, the power can be optimized by increasing size on tradeoff basis. |
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Thinking is going on to switch over design to asynchronous from synchronous design. Asynch. design consume 1/3 power for the same processing |
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clock gating and multiple voltage thresholds are well-established and supported by existing tools.To save leakage, some designs use power gating to shut down blocks that aren't in use, using multiple-threshold CMOS (MTCMOS) switches. The power-down and power-on sequences can be extremely complex to design and verify.But it will work in its best way |
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Selective shutting power down to an unused block will help but one needs to be careful when choosing which blocks to shut down and when, because powering up a block & shutting down also consumes power so it should be optimized properly...
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If all peripherals and clocks are switched on only when they are needed, I hope power consumptions will be the least. |
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