nRF7002 DK virtual COM ports

The onboard interface MCU features Universal Asynchronous Receiver/Transmitter (UART) interface through virtual COM ports.

The virtual COM ports have the following features:

Flexible baud rate setting up to 1 Mbps (baud rate 921,600 bps is not supported)
Dynamic Hardware Flow Control (HWFC) handling
Tri-stated UART lines when no terminal is connected

The following table shows an overview of the UART connections on nRF5340 System on Chip (SoC) and the interface MCU.

Table 1. Relationships of UART connections on nRF5340 and interface MCU
GPIO nRF5340	nRF5340 UART_2	nRF5340 UART_1
P0.19	RTS
P0.20	TXD
P0.21	CTS
P0.22	RXD
P1.05/TRACEDATA0		RTS
P1.01		TXD
P1.04/TRACEDATA1		CTS
P1.00		RXD

The UART signals are routed directly to the interface MCU. The UART pins connected to the interface MCU are tri-stated when no terminal is connected to the virtual COM port on the computer.

Note: The terminal software used must send a Data Terminal Ready (DTR) signal to configure the UART interface MCU pins.

The P0.19 (Request to Send (RTS)) and P0.21 (Clear to Send (CTS)) can be used freely when HWFC is disabled on the SoC.

Virtual COM ports