This page shows a diagram of the DAC conversion times. The tDCONV call out is the conversion time associated with using the DAC. This conversion time is taken whenever D/A conversion is switched from disabled to enabled and thereafter whenever the data register is written. Finally, notice that if D/A conversion is disabled and a value is written to the data register, a conversion is not performed. For the conversion times for a specific RX MCU please refer to the electrical characteristics section of the part's hardware manual.