ARM Technical Support Knowledge Articles

JTAG COMMUNICATION ERROR ON ARM

Applies to: ULINK USB-JTAG Debugger

Answer


Information in this article applies to:


QUESTION

I am using an STR71x device. When I display external memory in the uVision Debugger using the ULINK JTAG debugger I get the following error message:

JTAG Communication Failure

What can be the reason?

ANSWER

This error appears when the BUS cannot be addressed. The STR7 ARM devices from STMicroelectronic allow you to disable the BUS system using the RCCU registers. For example, the following statement disables the external BUS system:

RCCU_PER = 0;

MORE INFORMATION

SEE ALSO

Article last edited on: 2007-01-28 19:21:24

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