SEGGER offers enhanced Flasher support for AT90
Current Flasher model licenses include the right to download the required software and firmware updates free of charge. Similarly, use on all target devices currently supported, and on any that will be added, is also included: No additional licenses required, no hidden costs, no future costs.
Flashers work with a PC or in stand-alone mode, connect via USB and/or Ethernet (Flasher PRO, Flasher Compact, Flasher PRO XL, Flasher Portable PLUS and Flasher ARM), and are multi-platform for Linux, macOS and Windows.
For more information on SEGGER Flashers, please visit: https://www.segger.com/flasher-in-circuit-programmer/
For a detailed list of supported devices, please visit: https://www.segger.com/supported-devices/