Memories in Wireless sensor nodes

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Yaso

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Hey Everyone,

In a typical wsn there is SRAM, DRAM and Flash. When the nodes senses the data and then process it will it be saved in sram first then dram and then it is moved to Flash. What it the condition or criterion to move the data from SRAM to Flash or DRAM? Why do I need to do so and when does it happen. Another thing what is the probability of moving the data from sram to Dram or Flash?

Thanks a lot in advance.
 
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