Interrupt Clear Register
| RFFC | RX-FIFO full detection clear bit |
| RFEC | RX-FIFO and shift register empty-state detection clear bit |
| RFOC | RX-FIFO overrun detection clear bit |
| RFUC | RX-FIFO underrun detection clear bit |
| RFLETC | RX-FIFO-less-than-or-equal-to-threshold detection clear bit |
| RFMTC | RX-FIFO-exceeded-threshold detection clear bit |
| RSSRC | Slave select released detection clear bit |