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[General] Internal Reference Voltage of MSP430

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santh92

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Hello to all,

I am using MSP430F5438A microcontroller....
In that i am using 12-bit ADC(ADC12_A) with internal reference voltage...
By using the Reference module i have enabled the following registers..
REFCTL0 = REFMSTR + REFON + REFVSEL_3 + REFTCOFF + REFOUT;
I am sure in that the configuration for 2.5v....
But, when i am checking with input DC signal, my sample value of ADC become saturate at 1.69V of input DC.

And i am unable to measure the amplitude of internal reference voltage at PIN P5.0,
P5SEL = P5SEL | 0x01; // ENABLE P5.0 ADC A8
P5DIR = P5DIR | 0x01;
If there is any specific way to enable it... please let me know...

Thank you.
 

Hello!

TI has released myriads of sample codes for each of its functionalities.
Why not checking their code in the first place?

Dora.
 

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