Cortex-A8 R2P2.pdf - ARM Information Center

Debug31 3 2 1 0Reserved32-bit accessLocked bitLock implemented bitBits Field Function[31:3] - RAZ.Figure 12-26 Lock Status Register formatTable 12-41 shows how the bit values correspond with the Lock Status Registerfunctions.Table 12-41 Lock Status Register bit functions[2] 32-bit access 32-bit access. Indicates that a 32-bit access is required to write the key to the LockAccess Register. This bit always reads 0.[1] Locked bit Locked bit:0 = writes are permitted1 = writes are ignored, reset value.[0] Lock implemented bit Lock implemented bit. Indicates that the lock functionality is implemented. This bitalways reads 1.NoteThis lock has no effect on accesses initiated by the debugger. Therefore, if PADDR31is HIGH, all the bits in this register read 0.12.5.10 Authentication Status RegisterThe Authentication Status Register is a read-only register that reads the current valuesof the configuration inputs that determine the debug permission level.Figure 12-27 on page 12-65 shows the bit arrangement of the Authentication StatusRegister.12-64 Copyright © 2006-2008 ARM Limited. All rights reserved. ARM DDI 0344E