3.15.39. Lock Access Register

The LAR characteristics are:


Controls write access from self-hosted, on-chip accesses. The LAR does not affect the accesses that use the external debugger interface.

Usage constraints

There are no usage constraints.


This register is available in all configurations.


See the register summary in Table 3.151.

Figure 3.181 shows the bit assignments.

Figure 3.181. LAR bit assignments

To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.

Table 3.190 shows the bit assignments.

Table 3.190. LAR bit assignments


Software lock key value.


Clear the software lock.

All other write values set the software lock.

Copyright © 2011-2013, 2015 ARM. All rights reserved.ARM DDI 0480G