The interface MCU also features three Universal Asynchronous Receiver/Transmitter (UART) interfaces through three virtual COM ports.
The virtual COM ports are the following:
For details on routing VCOM0 and VCOM2, see nRF9160 DK board control.
The following table shows an overview of the General-Purpose Input/Output (GPIO)s used for the UART connections on nRF9160 and nRF52840:
| nRF91 APP1 | nRF91 APP2 | nRF52840 | |
|---|---|---|---|
| TXD | P0.29 | P0.01 | P0.03 |
| RXD | P0.28 | P0.00 | P0.05 |
| CTS | P0.26 | P0.15 | P0.07 |
| RTS | P0.27 | P0.14 | P1.08 |