11.1. About the Serial Wire Output

The CoreSight SWO is a trace data drain that acts as a bridge between the on-chip trace data to a data stream that is captured by a Trace Port Analyzer (TPA). It is a TPIU-like device that supports a limited subset of the full TPIU functionality, to minimize gate count for a simple debug solution.

Compared to the TPIU, the SWO contains:

Figure 11.1 shows a block diagram of the SWO.

Figure 11.1. SWO block diagram

The CoreSight SWO is designed to be used as part of either:

Copyright © 2004-2009 ARM. All rights reserved.ARM DDI 0314H