LOCK (XMPU_FPD) Register Description
Register Name | LOCK |
---|---|
Offset Address | 0x0000000020 |
Absolute Address | 0x00FD5D0020 (FPD_XMPU_CFG) |
Width | 1 |
Type | rwNormal read/write |
Reset Value | 0x00000000 |
Description | Register Write Lock. |
All register writes must be done by a secure bus master as defined by TrustZone. The write lock prevents the secure master from writing to all registers except the status registers: ISR, IMR, IEN and IDS. Note: all XMPU registers are readable by secure bus masters. Note: regardless of the LOCK [RegWrDis] setting, the status registers are always writeable by secure and non-secure bus masters.
LOCK (XMPU_FPD) Register Bit-Field Summary
Field Name | Bits | Type | Reset Value | Description |
---|---|---|---|---|
RegWrDis | 0 | rwNormal read/write | 0x0 | Register Write Disable. Applies to all registers except ISR, IMR, IEN and IDS. 0: read/write allowed. 1: read-only. Once this bit is set, it can only be cleared by an OCM_XMPU reset. |