Hello.
I am evaluating the EVAL-ADuCM410 and have a question regarding the DAC output.
Is it the specification that values set to DACDATx while the DAC is in the Power-Down state (DACCONx = 0x00000D12) are automatically reflected in the DAC output after DAC Enable (bit 8 of DACCONx = 0)?
Also, if the same DACDATx value set during Power-Down is written again after DAC Enable, will the DAC output not be updated, and will the DAC output be updated only when the DACDATx value is changed?
With the DAC in the DAC Power-Down state (DACCONx: 0x00000D12), I configured the output (DACDATx: 0x08000000) and then enabled the DAC (bit 8 of DACCONx = 0), resulting in a 0V output. (The value read back from DACDATx was 0x08000000.)
When I set DACDATx to a value different from the one set during Power-Down—such as 0x08001000—the output finally reached a value close to 1.25V.
Although the value loaded during Power-Down is retained internally, writing the same value after enabling does not trigger an update event; it appears that the value is transferred to the DAC latch only when the value changes.
Best regards.