3.6.1 Serial Wire Debug Port

PL360MB board includes a Serial Wire Debug Port (SW-DP) used for internal debugging functions, such as downloading code and single-stepping through programs. It also embeds a serial wire trace. The SW-DP port is a 10-pin, dual row, 0.1-inch male connector (J18). This connector provides the required interface for in-circuit emulators. To use the ARM Multi-ICE and Atmel SAM-ICE a JTAG adapter for 20 to 10 pins is necessary, e.g., this one.

Please refer to the PL360 datasheet for a further description of SW-DP debug port.

Figure 3-37. SWD & Trace Schematic

CAUTION: Remember that the SW-DP connector is non-isolated from mains. Please make use of proper isolation (i.e.: USB isolator device) in case of debugging when the board is not galvanically isolated (metrology circuit measurements or using an PLCOUPxxx board which it is not isolated from mains).

Important: If you are using USB isolators to connect the devices to the computer, take into account the possible noise that these isolators could be adding to the PLC network. Some of these USB isolators use frequencies of the FCC band that could affect the communications. For example, you can use the UH401.