3.2 On-Board Debugger Connections
The table below shows the connections between the target and the debugger. All the connections between the target and the debugger are tri-stated when the debugger is not using the interface. Therefore, there are few contaminations of the signals, for example, the pins can be configured to anything the user wants.
Info: The 12-edge connections closest to
the USB connector on Curiosity Nano boards have a standardized pinout. The program or
debug pins have different functions depending on the target programming
interface.
| Debugger Pin | PIC32CM3204GV00064 Pin | Description | |
|---|---|---|---|
| CDC TX | PA13 | USART1 RX | USB CDC TX line |
| CDC RX | PA12 | USART1 TX | USB CDC RX line |
| DBG0 | PA31 | SWDIO | Debug data line |
| DBG1 | PA30 | SWCLK | Debug clock line |
| DBG2 | PA03 | GPIO | Debug GPIO0/SW0 |
| DBG3 | nRESET | RESET | Reset line |
| ID | – | – | ID line for extensions |
| NC | – | – | No connect |
| VBUS | – | – | VBUS voltage for external use. |
| nVOFF | – | – | Voltage Off input. Disables the target regulator and target voltage when pulled low. |
| VTG | – | – | Target voltage |
| GND | – | – | Common ground |