TRCLAR, Lock Access Register

The TRCLAR characteristics are:

Purpose

Used to lock and unlock the Software Lock.

Note that ETE does not implement the Software Lock.

For additional information, see the CoreSight Architecture Specification.

Configuration

This register is present only when FEAT_ETE is implemented. Otherwise, direct accesses to TRCLAR are RES0.

Attributes

TRCLAR is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
KEY

KEY, bits [31:0]
When Software Lock is implemented:

Software Lock Key.

A value of 0xC5ACCE55 unlocks the Software Lock.

Any other value locks the Software Lock.


Otherwise:

Reserved, RES0.

Accessing TRCLAR

External debugger accesses to this register are unaffected by the OS Lock.

TRCLAR can be accessed through the external debug interface:

ComponentOffsetInstance
ETE0xFB0TRCLAR

This interface is accessible as follows:


30/06/2021 15:22; 2a17f7750cfd1ab239f20f6cf29877ba8041794f

Copyright © 2010-2021 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.