Chris Phelan

MKV10Z64 - VLPS - high current draw

Discussion created by Chris Phelan on May 11, 2017
Latest reply on Jun 7, 2017 by Robin_Shen

Greetings. I am using the above MCU in a device I am developing. Sleep current in VLPS is ~380uA (confirmed that this is the draw of the MCU alone). Per the datasheet, it should be much much lower. I am using the functions per SDK2.2 to enter VLPS, I am seeing a drop from run time draw (~2mA) to this sleep current draw, so I know that the MCU is entering a lower power state, but I cannot achieve the numbers I expect. All un-used pins are pulled low using internal pull downs and driven low (excluding the JTAG lines - although I suppose I could add them to the list too). Any ideas about what else I should check? Is something defaulted to on (via SDK2.2 or otherwise) that I should be disabling? I believe the core clock is disabled in VLPS so no value in dropping clock speed when sleeping, correct?

 

Any help is appreciated!

 

-Chris

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