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Original question:

AM3352: [2,3,4,6] Resister setting of PaRAM

AM3352: [5] Which value of AD data is readouts from ADC?

Kurumi Hasegawa
Expert 7891 points
Part Number: AM3352

Hi team,

One of the customers having difficulties with AM335x ADC and I’d like to ask your help.

They are using AM335x ADC to detect power-off event. They have questions regarding how to readouts FIFO0 by EDMA.

The current setting is;

  • The power supply voltage of the CPU board is detected by internal ADC (TSC_ADC).
  • ADC output is detected as OUT_OF_RANGE interrupt, so the interruption occurs only when the AD signal exceeds certain value.
  • EDMA readouts FIFO AD accumulated data to prevent ADC overrun.

The question is, Which value of AD data is readouts from ADC FIFO0DATA in CONST mode?

If the SAM Field of PaRAM opt is set as CONST mode, data would be readout to the destAddr of PaRAM. Which part of the AD data would be readout-ed, and how long (bites) it would be?

Best regards,

Kurumi