SLVUCU5 December 2025 UCD91160 , UCD91320
Each page has its own Fault Slaves Mask, whose bits are defined as follows:
| Bit | 31 | ... | 13 | 12 | 11 | 10 | 9 | 8 |
| Purpose | PAGE31 fault slave | ... | PAGE13 fault slave | PAGE12 fault slave | PAGE11 fault slave | PAGE10 fault slave | PAGE9 fault slave | PAGE8 fault slave |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Purpose | PAGE7 fault slave | PAGE6 fault slave | PAGE5 fault slave | PAGE4 fault slave | PAGE3 fault slave | PAGE2 fault slave | PAGE1 fault slave | PAGE0 fault slave |
Each page can have multiple fault slave pages. When a fault occurs on the master page, if its response is to shut down, all slave pages are also shut down. If retries are specified for the master page, the slave pages remain running until all retries are exhausted. The slave pages are shut down using sequence off dependencies and TOFF_DELAY. The slave pages do not perform any retries during the fault slave shutdown.
After being shut down, slave rails are latched off as if they had experienced the fault. To re-enable their outputs, an off command must be received before another on command is accepted. A status bit is set in their MFR_STATUS word indicating the reason they are latched off.