Receive Clock Mode Register
| CKS | Receive Clock Selection |
| CKO | Receive Clock Output Mode Selection |
| CKI | Receive Clock Inversion |
| CKG | Receive Clock Gating Selection |
| START | Receive Start Selection |
| STOP | Receive Stop Selection |
| STTDLY | Receive Start Delay |
| PERIOD | Receive Period Divider Selection |