Problem with write to CFR in ADS8331

Marcin Kolodz

Prodigy 30 points

Hi.

Firstly, i wolud like tell that i read all topics about problems with ADS8331 and nothing...

I have good comunication with my ADS8331 but I can't write settings to CFR.

ADS8331 send me good values but all inputs. When i send different bits to CFR there's nothing happend.

I need read values only one input but i can't change the settings of ADS8331.

Please help as soon as possible ( apologise for my English)

over 11 years ago

0 Lokesh Ghulyani over 11 years ago

TI__Expert 8630 points

Hello Marcin,

For writing to CFR, the first four bits will be 1110 followed 12 bits of CFR register. And you need to follow Timing diagram given on Figure 3 on Page 9 of datasheet. Can you waveforms(Screeshots) for CS,SDI,SCLK & SDO while CFR register is being written?

-Lokesh

0 Marcin Kolodz over 11 years ago in reply to Lokesh Ghulyani

Prodigy 30 points

I don't have an osciloscope now so i can't shoot the picture.

But when i write something (CFR write CRF read or Channel select ) to register i get replay "0"

i get the score only after short convst.

I can read 1 walue and nothing else.

Thanks for reply

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Problem with write to CFR in ADS8331