nRF7002 DK virtual serial port or COM ports

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

Both virtual serial ports are connected to the nRF5340 System on Chip (SoC) and have the following features:

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

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

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

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 serial port on the computer.

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

Pins 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 serial ports