Editing AVR microcontrollers (section)

=== Atmel-ICE ===
The Atmel ICE is the currently supported inexpensive tool to program and debug all AVR devices (unlike the AVRISP/AVRISP mkII, Dragon, etc. discussed below). It connects to and receives power from a PC via USB, and supports [[JTAG]], [[Pentaho Data Integration|PDI]], [[aWire]], [[debugWIRE]], [[Serial Peripheral Interface|SPI]], [[JTAG#Similar interface standards|SWD]], [[Tiny Programming Interface|TPI]], and UPDI (the Microchip Unified Program and Debug Interface) interfaces.

The ICE can program and debug all AVRs via the JTAG interface, and program with additional interfaces as supported on each device:
* 8-bit AVR XMEGA devices via the PDI 2-wire interface
* 8-bit megaAVR and tinyAVR devices via SPI for all with OCD (on-chip debugger) support
* 8-bit tinyAVR microcontrollers with TPI support
* 32-bit SAM Arm Cortex-M based microcontrollers via SWD

Target operating voltage ranges of 1.62V to 5.5V are supported as well as the following clock ranges:
* Supports JTAG & PDI clock frequencies from 32&nbsp;kHz to 7.5&nbsp;MHz
* Supports aWire baud rates from 7.5&nbsp;kbit/s to 7&nbsp;Mbit/s
* Supports debugWIRE baud rates from 4&nbsp;kbit/s to 0.5&nbsp;Mbit/s
* Supports SPI clock frequencies from 8&nbsp;kHz to 5&nbsp;MHz
* Supports SWD clock frequencies from 32&nbsp;kHz to 2&nbsp;MHz

The ICE is supported by the Microchip Studio IDE, as well as a command line interface (atprogram).

The Atmel-ICE supports a limited implementation of the Data Gateway Interface (DGI) when debugging and programming features are not in use. The Data Gateway Interface is an interface for streaming data from a target device to the connected computer. This is meant as a useful adjunct to the unit to allow for demonstration of application features and as an aid in application level debugging.