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BillGiovino
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Re: Feb 20 - Day 3 - Selecting a 32-bit Microcontroller
BillGiovino   2/20/2013 1:54:01 PM
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A followup from a question on yesterday about dynamically turning RAM and peripherals on a microcontroller on and off. Microchip and Atmel responded to me:

For both Atmel and Microchip: for peripherals, you can stop the clock to peripherals as well as turn off the power supply to the peripheral.

Atmel RAM: "For ultra low power micros users can normally select if they want to power the entire SRAM or parts of it. This is new technology that is rolling out fast now"

"For peripherals Atmel does clock gating (i.e. remove the clock source to the peripheral) on devices in low leakage processes where switching is the major contributor to power consumption. This includes tinyAVR, megaAVR and AVR XMEGA. For products in denser process geometries where not only switching, but also leakage is a big contributor we have inplemetned power islands for both peripherals and SRAM, example products are SAM7L, UC3L and SAM4L"



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