UARTE implements EasyDMA for reading and writing to and from RAM.
If the DMA.TX.PTR and the DMA.RX.PTR are not pointing to the RAM region, an EasyDMA transfer may result in a HardFault or RAM corruption. See Memory for more information about each memory region.
The DMA.RX.PTR, DMA.TX.PTR, DMA.RX.MAXCNT, and DMA.TX.MAXCNT registers are double-buffered. They can be updated and prepared for the next reception or transmission immediately after having received the DMA.RX.READY or DMA.TX.READY events.
The DMA.RX.END and DMA.TX.END events indicate that the EasyDMA is finished accessing the RX or TX buffer in RAM.
For detailed information regarding the use of EasyDMA, see EasyDMA.