On-Board Debugger Overview

ATtiny3217 Curiosity Nano contains an on-board debugger for programming and debugging. The on-board debugger is a composite USB device consisting of several interfaces:

The on-board debugger controls a Power and Status LED (marked PS) on the ATtiny3217 Curiosity Nano Board. The table below shows how the LED is controlled in different operation modes.

Table 1. On-Board Debugger LED Control
Operation Mode Power and Status LED
Boot Loader mode The LED blinks slowly during power-up.
Power-up The LED is ON.
Normal operation The LED is ON.
Programming Activity indicator: The LED blinks slowly during programming/debugging.
Drag-and-drop programming
Success:
The LED blinks slowly for 2 sec.
Failure:
The LED blinks rapidly for 2 sec.
Fault The LED blinks rapidly if a power fault is detected.
Sleep/Off The LED is OFF. The on-board debugger is either in a sleep mode or powered down. This can occur if the board is externally powered.
Info: Slow blinking is approximately 1 Hz, and rapid blinking is approximately 5 Hz.