J-Link/J-Trace User's Guide 3 Connectors

Connectors

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Several 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")
• Cortex Debug+ETM Connector (20-pins, 0.05")
• ARM Standard JTAG Connector (20-pins, 0.10")

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

• Pin 7 is keyed and is removed from the connector.
• The 10-pin Samtec FTSH-105-01 connector has the dimensions: 0.25" x 0.188" (6.35mm x 4.78mm).

Cortex Debug+ETM Connector (20-pins, 0.05")

This connector offer 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

• Pin 7 is keyed and is removed from the connector.
• The 20-pin Samtec FTSH-110-01 connector has the dimensions: 0.50" x 0.188" (12.70mm x 4.78mm).

ARM Standard JTAG Connector (20-pins, 0.10")

This JTAG connector delivers the same functionalities as the 10-pin Cortex Debug connector.

Note

• Dimensions of the ARM JTAG connector are 1.29" x 0.722" (33mm x 18.5mm).