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Technical Support On-Line Manuals J-Link/J-Trace User's Guide ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
ConnectorsSeveral target connectors can be installed on the circuit board to access an ARM target system. You can physically plug in units, such as J-Link or J-Trace, to program, debug, and trace hardware systems. The following units work in JTAG as well as in Serial Wire mode:
Cortex Debug Connector (10-pins, 0.05") This 10-pin Cortex Debug connector offers ITM and DWT trace information. Two pins (SWD) are used for debugging, where one bi-directional pin (SWDIO) is used to transfer the information and the second pin (SWDCLK) is used for the clock. A third pin (SWO) delivers the trace data at minimum system cost. The Serial Wire and JTAG pins are shared.
Note
Cortex Debug+ETM Connector (20-pins, 0.05") This connector offers debug features, ITM and DWT trace data, as well as ETM instruction trace. ETM signals are output on additional four pins (TRACEDATA). A fifth pin is used for the trace clock (TRACECLK). This way, ETM can be used in either SW or JTAG mode. This connector is a super set of the 10-pin Cortex Debug connector. The first 10 pins on both connectors are identical.
Note
ARM Standard JTAG Connector (20-pins, 0.10") This JTAG connector delivers the same functionalities as the 10-pin Cortex Debug connector. ![]() Note
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