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Help me in a MSP430 Signal polarity detection

Other Parts Discussed in Thread: MSP430G2553

Dear all,

 I have a 2.5 mV signal and I want to swap two LEDs depending on the polarity of the signal. I am currently using Ch4 and Ch5 of MSP430G2553 and then compare which pin is getting higher voltage and then glow the led. but can i use the comparator of the SD function ?

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