MSP430F5510: ADC sequence of channels

rafael flores

Part Number: MSP430F5510

HI, i'm working with msp430f5510 and I have a doubt that can't find in the datasheet, so to do a sequence of conversion I have to tell wich input to start and then goes decrementing until input 0, my doubt is can i use non consecutive pins? for example if i need to use AN1, AN3 and AN6 and i start from AN6 will work?

over 6 years ago

0 Dennis Lehman over 6 years ago

TI__Guru 71216 points

Hi Rafael,

Check out this code example for the MSP430F5510.

0 rafael flores over 6 years ago in reply to Dennis Lehman

Intellectual 340 points

that example works for ADC12 and msp430f5510 only has ADC10 wich you can't select order of channel or end of sequence

0 Bruce McKenney over 6 years ago

Guru 102905 points

Based on User Guide (SLAU208Q) Sec 27.2.7.2, the ADC10_A always samples from INCH down to A0. (This is similar to the ADC10-s on e.g. the F2 series.)

So no, you can't skip any intervening channels; you have to go ahead and sample them all and throw away the ones you don't want.

This is a bit of a waste, but doesn't generally cause any trouble; sampling a digital pin (very low impedance) doesn't "sip" enough current for the GPIO to notice.

0 rafael flores over 6 years ago in reply to Bruce McKenney

Intellectual 340 points

Ok, that's what I wanted to know!

thanks for oyur help

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MSP430F5510: ADC sequence of channels