Debug Halting Control and Status Register
| C_DEBUGEN | Enable Halting debug |
| C_HALT | Halt processor |
| C_STEP | Enable single step |
| C_MASKINTS | Mask PendSV, SysTick and external configurable interrupts |
| S_SNAPSTALL | Snap stall control |
| S_REGRDY | Register ready status |
| S_HALT | Halted status |
| S_SLEEP | Sleeping status |
| S_LOCKUP | Lockup status |
| S_SDE | Secure debug enabled |
| S_RETIRE_ST | Retire sticky status |
| S_RESET_ST | Reset sticky status |
| S_RESTART_ST | Restart sticky status |