Event Enable Register.
| DMA | Enable DMA event. When this bit is set, a DMA event will cause an RXEV event to wake the CPU from WFE sleep mode. |
| RX | Enable RXEV pin event. When this bit is set, a logic high of GPIO0[20] will cause an RXEV event to wake the CPU from WFE sleep mode. |
| TX | Enable TXEV pin event. When this bit is set, TXEV event from the CPU is output to GPIO[21]. |