Access control register
| LATENCY | Latency |
| PRFTEN | Prefetch enable |
| ICEN | Instruction cache enable |
| DCEN | Data cache enable |
| ICRST | Instruction cache reset |
| DCRST | Data cache reset |
| RUN_PD | Flash Power-down mode during Low-power run mode |
| SLEEP_PD | Flash Power-down mode during Low-power sleep mode |