STMicroelectronics STM32F427 Manual page 28

STM32F42xx and STM32F43xx silicon limitations
Workaround
To stop the current DMA-to-DAC transfer and restart, the following sequence should be
applied:
1. Check if DMAUDR is set.
2. Clear the DAC/DMAEN bit.
3. Clear the EN bit of the DAC DMA/Stream
4. Reconfigure by software the DAC, DMA, triggers etc.
5. Restart the application.
28/36 DocID023833 Rev 5
STM32F42xx and STM32F43xx