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BillGiovino
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Re: Feb 20 - Day 3 - Selecting a 32-bit Microcontroller
BillGiovino   2/20/2013 1:54:33 PM
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MICROCHIP
32-bit Answer: For most MCUs, including the 32-bit PIC32 MCUs, you have to have more than one bank of RAM in order to be able to turn unused RAM off.  Since the PIC32s currently all have a single bank of RAM, it's not currently possible to turn off any RAM in a PIC32.

16-bit Answer:
Microchip does have the ability to selectively power the RAM in sleep with their 16-bit MCUs.  This is the difference between the LV-Sleep Mode and the Deep Sleep Mode.  This saves a lot of power.  LV-Sleep is roughly 300 nA, while Deep Sleep is 10nA with RAM off.



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