AM2634: ADC - Burst Mode and Post-Processing Blocks

Hi Jan,

Jan J said:

Is it possible to have burst sizes larger than 16 SOCs to oversample a channel more than 16x? Or does the burst needs to be triggered multiple times to do so?

The maximum number of SOCs which can be converted per burst trigger is 16.

Please see the AM263x TRM (https://www.ti.com/lit/pdf/spruj42), 3.1.4.1 CONTROLSS_CFG_ADCBURSTCTL Register

Jan J said:

From the Technical Reference Manual it seems that I can accumulate serveral ADC results in hardware using the Post-Processing Blocks. Neither in the .syscfg nor in the register setup I can enable this functionality.  Am I missing something?

Which section are you looking at in the TRM? Which specific functionality do you see in the TRM which isn't configurable from Sysconfig?

In Sysconfig, the PPB is configured from "PPB Configurations Post Processing Block Configurations":

Regards,
Frank

Hi Frank,

thanks for your help and your fast reply.

I was looking at section 7.4.2.9 Post-Processing Blocks at page 431 figure 7-39. In the figure there is a aggregation (t+2) block shown with a Max, Min and Accumulate block. I thought ADC results can be summed up in hardware by using this block and I was wondering how to activate it (there is also a short ability summary above the figure).

Best regards,

Jan

Hi Jan,

Thanks for clarifying. I'm looking into this and will get back with you shortly.

Regards,
Frank

Hi Frank,

Thanks for your help and clarifying it.

Best regards,

Jan