stm32u535cb How does ADC implement DMA Ping-Pong operation?

[AScha.3]

It does not - just you can setup the DMA to do double buffer or circular buffering , read :

https://www.st.com/content/ccc/resource/training/technical/product_training/group1/75/12/e2/f7/f3/72/46/df/STM32U5-System-DMA-Circular-buffering-double_buffering_DMACBDB/files/STM32U5-System-DMA-Circular-buffering-double_buffering_DMACBDB.pdf/_jcr_content/translations/en.STM32U5-System-DMA-Circular-...