| Copyright © 2011-2012 ARM. All rights reserved. | ARM DDI 0480B |
| Non-Confidential | ID042612 |
 PDF version | |
| Home > Granular Power Requestor > Granular Power Requestor interfaces > Device unlocking |
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On reset, the device is locked. The device is unlocked when you write 32'hC5ACCE55 to the LAR register. Write operations to other registers in the device are permitted only when the device is unlocked. Read operations are permitted regardless of the device’s lock status. When paddr31 is driven HIGH and the debugger initiates an operation:
write operations to the LAR register are ignored
read operations to the LAR register return 0, indicating that no lock mechanism is present.
| Copyright © 2011-2012 ARM. All rights reserved. | ARM DDI 0480B |
| Non-Confidential | ID042612 |
| PDF version | |
| Home > Granular Power Requestor > Granular Power Requestor interfaces > Device unlocking |