ARM Technical Support Knowledge Articles

Why am I unable to connect to the ST-Ericsson U8500 platform after a reset?

Applies to: DS-5


After reset the ST-Ericsson U8500 runs in secure mode during the initial part of the boot process and prevents JTAG debug. This means the DS-5 Debugger will not be able to connect to (or control) the target until the cores have advanced beyond this point.

If you reset the target in the DS-5 Debugger, the cores must run until this section of the boot process is complete before it is possible to debug. (Note if you are connected to both cores in DS-5 and issue a reset, core0 must be allowed to run until debug access to core1 is also enabled. This may require you to manually resume execution on core0.)

Article last edited on: 2011-06-29 11:27:33

Rate this article

Disagree? Move your mouse over the bar and click

Did you find this article helpful? Yes No

How can we improve this article?

Link to this article
Copyright © 2011 ARM Limited. All rights reserved. External (Open), Non-Confidential