6.10.1. DAP placement

It is recommended that you place the DAP near the edge of the SoC because there are external pins for connection to the SWJ interface.

It is strongly recommended that all the debug and trace infrastructure on a SoC is accessible from the DAP. This includes:

There must be no dependencies between debug systems that are accessible from a single DAP. This enables full support for topology detection.

If several, completely independent debug and trace systems are present on completely independent systems, then each can be accessed by an individual DAP.

Debug and trace systems are not independent if there are any of the following:

This ensures that you can build independent systems instantiated on the same ASIC while maintaining full CoreSight compliance.

Copyright © 2004, 2007, 2010 ARM Limited. All rights reserved.ARM DGI 0012D