- Turn off the power to the target system.
- Make sure that the USB cable from the USB TAP probe is not connected to the host computer.
- Make sure that pin 1 of the gray ribbon cable connector aligns with pin 1 on the target's debug port header.
The figure below shows pin 1 of the USB TAP probe.
Figure 1.
USB TAP Probe

- Gently (but firmly) press the connector onto the target system debug port header.
This is how you can connect the USB TAP cable to the target debug port.