Abstract
When developers first move to a Cortex-based microcontroller, they are chiefly concerned with the performance and power consumption of the Cortex-M processor and the peripherals provided by the microcontroller. It is often assumed that the Cortex-M processor is debugged with a JTAG style of debugger. In fact, the Cortex-M processor provides an advanced and feature-rich debug system called CoreSight, which in addition to the “JTAG” style of debugging has up to three real-time trace units. This chapter describes the key features of the CoreSight debug architecture, how to access them, and how they can be used for debugging and code verification.
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