MC9S08QE8 16Pins consumption

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MC9S08QE8 16Pins consumption

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DavidoBG
Contributor II
I would like know the exact MCU's consumption. In fact, I load my program inside the MCU and i check the global application board consumption. (16mA @ 4MHz). After i force reset of MCU (to apply GND to reset Pin #1). But my consumption increase (35mA). I don't understand why? I think that the reset allow to "bypass consumption" of my MCU (because it don't run). A force reset manually could be provide a short circuit?
 
In other word, i have my global consumption @ 4MHz = 16mA. I bypass (due to reset) my MCU. I hope that my global consumption decrease (for example 13mA). So i can result my MCU consumption easily:
MCU consumption @ 4MHz = 16mA -13mA = 3mA. But my consumption increase when i put a GND to pin#1 of MCU 
 
May be, it is recommanded to do this to put MCU to stop mode?
What do you think about this?
Thanks
David
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peg
Senior Contributor IV
Hello,
Well, the numbers don't quite add up, but turning on the reset will result in some additional system current via the internal pullup resistor and perhaps an external one. Using stop mode would seem more appropriate for doing this.

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