ARM Technical Support Knowledge Articles

Is there any requirement that Access Ports (APs) occupy consecutive positions starting from DAP Bus APSEL=0x0 (slot zero)?

Applies to: CoreSight System Design

Answer

No, the architecture does not mandate starting at slot zero or occupying consecutive slots.

Well-designed debug tools should scan all 256 possible slots on the DAP Bus to determine whether an AP is present in that slot.

Any unoccupied slot should read as zero.

Rate this article

[Bad]
|
|
[Good]
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