The EmbeddedICE^® logic in ARM processors contains a Debug Communications Channel (DCC). This enables data to be passed between the target and the RealView Debugger using the JTAG port and a protocol converter without stopping the program flow or entering debug state. The Comms Channel view enables you to communicate with the target over DCC.

Figure 1.10 shows an example:

By default, data sent to the target is displayed in the Data log pane, and appears as grey text. You can choose to hide the data sent to the target from the Data log pane.

Data received from the target is displayed as black text in the Data log pane.