ARM Technical Support Knowledge Articles

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

Applies to: DS-5

Answer

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

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