TMS320F280039C: ADC PPB Threshold Compare diagram

Johnny Chen

Tool/software:

Hi Champ,

I am reconfirming for my customer about ADC PPB Threshold Compare.

There are PPBxTRIPHI and PPBxTRIPLO could be configured for corresponding comparator trip high limit and trip low limit value.

Is the ADCEVTSTAT be set / PPB generate an interrupt when the ADCPPBxRESULT voltage goes above about ADCPPBxTRIPHI or below about ADCPPBxTRIPLO as a window comparator here ?

From the TRM ADC PPB Block Diagram, the logic doesn't match. It does not represent the intended output of the comparator. If it's correct, could we fix the polarities for the connection to the threshold comparator ? It's confusing for user.

Thanks and regards,

Johnny

8 months ago

0 Johnny Chen 8 months ago

TI__Expert 5140 points

Hi Champ,

Any chance to get any update here?

Regards,

Johnny

0 Nilesh Khanna 8 months ago in reply to Johnny Chen

TI__Intellectual 2270 points

Hi Johnny,

Let me check this with the team, I will get back to you.

Thanks,

Nilesh

+1 Nilesh Khanna 8 months ago in reply to Nilesh Khanna

TI__Intellectual 2270 points

Hi Johnny,

Johnny Chen said:
Is the ADCEVTSTAT be set / PPB generate an interrupt when the ADCPPBxRESULT voltage goes above about ADCPPBxTRIPHI or below about ADCPPBxTRIPLO as a window comparator here ?

That is correct.

Johnny Chen said:
From the TRM ADC PPB Block Diagram, the logic doesn't match. It does not represent the intended output of the comparator. If it's correct, could we fix the polarities for the connection to the threshold comparator ? It's confusing for user

I will communicate to get the polarity corrected in Next revision of TRM.

BR,

Nilesh

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TMS320F280039C: ADC PPB Threshold Compare diagram