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 1. Curiosity Nano Standard Pinout
Debugger Signal Target MCU Description
ID ID line for extensions
CDC TX UART RX USB CDC TX line
CDC RX UART TX USB CDC RX line
DBG0 ICSPDAT Debug data line
DBG1 ICSPCLK

Debug clock line

DBG2 GPIO0 debug GPIO0
DBG3 MCLR Reset line
NC No connect
VBUS VBUS voltage for external use
VOFF Voltage Off input. Disables the target regulator and target voltage when pulled low.
VTG Target voltage
GND Common ground
Figure 1. Curiosity Nano Standard Pinout