16.1 Description

The device features a number of complementary debug and test capabilities.

A common JTAG/ICE (In-Circuit Emulator) port is used for standard debugging functions, such as downloading code and single-stepping through programs.

A 2-pin debug port Serial Wire Debug (SWD) replaces the 5-pin JTAG port and provides an easy and risk-free alternative to JTAG as the two signals, SWDIO and SWCLK, are overlaid on the TMS and TCK pins, allowing for bi-modal devices that provide the other JTAG signals. These extra JTAG pins can be switched to other uses when in SWD mode.

A set of dedicated debug and test input/output pins gives direct access to these capabilities from a PC-based test environment.