LDC1312EVM: CHx_FIN_DIVIDER

K.Yaita

Part Number: LDC1312EVM

Hi Team,

I would like to ask about LDC1312EVM.

I couldn't set "Fin Select" more than 2 in Sensing Solutions EVM GUI.
Why it can't be set?
I believe CH0_FIN_DIVIDER has 4bit long(0x14[15:12]).

Best Regards,
Yaita / Japan disty

over 7 years ago

0 K.Yaita over 7 years ago

Guru 29710 points

I found the following sentence in EVM User's guide.

(page 26)
If the resonant frequency of the sensor is less than 8.75 MHz the Fin select should be set to one. If the sensor frequency is greater than 8.75 MHz, Fin select should be two.
http://www.tij.co.jp/jp/lit/ug/snou135a/snou135a.pdf

Could you also tell me the background why we should set one or two for Fin select?
Should I consider that more than two isn't recommended for Fin select?

Best Regards,
Yaita

0 Luke LaPointe over 7 years ago in reply to K.Yaita

TI__Genius 13335 points

Hello Yaita-san,
The GUI limits the selection to 1 or 2, because there is no practical value for increasing beyond this point. You can however use the register tab to write the CLOCK_DIVIDERS_CHx register directly and you should get up to divide by 15. Note that writing 0 is reserved/not valid.
Regards,
Luke

0 K.Yaita over 7 years ago in reply to Luke LaPointe

Guru 29710 points

Hi Luke-san,

Thank you for your answer.
I understood.

Best Regards,
Yaita

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LDC1312EVM: CHx_FIN_DIVIDER