Versal ACAP Register Reference > Module Summary > IPI Module > LOCK (IPI) Register
| Register Name | LOCK |
|---|---|
| Relative Address | 0x0000000090 |
| Absolute Address | 0x00FF300090 (IPI) |
| Width | 1 |
| Type | rwsoRead/write, set only |
| Reset Value | 0x00000000 |
| Description | Register Write Lock. Once set, this can be cleared by PoR |
All register writes must be done by a secure bus transaction. The write lock prevents the secure transaction from writing to all registers except the interrupt status registers: APB_MISC_ISR. Note: regardless of the LOCK [RegWrDis] setting, the status registers are always writeable by secure transactions.
| Field Name | Bits | Type | Reset Value | Description |
|---|---|---|---|---|
| RegWrDis | 0 | rwsoRead/write, set only | 0x0 | Register Write Disable. Applies to all global registers except ISR 0: read/write allowed. 1: read-only. Once this bit is set, it can only be cleared by a PoR |