How to save more power when your CPLD device is in idle mode?
Use a very slow clock to reduce toggle rate? Partially disabling the logic inside the device? Well, why not powering off the device?
I came across this interesting article by accident and found it a simple yet smart idea to prolong the battery life of a portable handheld devices. In future, if I have the chance to design a portable product with interactive user interface, this idea will surely be the first one to cross my mind.
If for whatever reason, you have to use a FPGA in a battery-operated product, this article will sure help you more.
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