The debug interface is enabled by default and can be disabled by placing a jumper on connector J19. The UART signals can be accessed via the mikroBUS1 connector or via the integrated USB-UART bridge provided by J-Link-OB.
Figure 1. Debug COM Port Interface
The table below describes the COM port debug interface signals.
| PIO | Mnemonic | Shared | Signal Description |
|---|---|---|---|
| PB26 | URXD0 | DEBUG | Receive data |
| PB27 | UTXD0 | DEBUG | Transmit data |