3.2 Curiosity Nano Standard Pinout

The 12 edge connections closest to the USB connector on Curiosity Nano boards have a standardized pinout. The program/debug pins have different functions depending on the target programming interface, as shown in the table and figure below.

Table 3-3. Curiosity Nano Standard Pinout
Debugger SignalTarget MCUDescription
IDID line for extensions
CDC TXUART RXUSB CDC TX line
CDC RXUART TXUSB CDC RX line
DBG0UPDIDebug data line
DBG1GPIO1

debug GPIO1

DBG2GPIO0debug GPIO0
DBG3RESETReset line
NCNo connect
VBUSVBUS voltage for external use
VOFFVoltage Off input. Disables the target regulator and target voltage when pulled low.
VTGTarget voltage
GNDCommon ground
Figure 3-3. Curiosity Nano Standard Pinout