Preface

The AVR® Programming Adapter kit (AC31S18A) provides an easy way to access the signals used for the standard programming interfaces SPI, TPI, PDI, UPDI, and AVR JTAG when using MPLAB® Debugger/Programmer Hardware Tools supporting the 8-pin single-row interface. The AVR Programming Adapter features standard headers for a variety of AVR® microcontrollers on familiar headers. Users can easily debug or program their AVR® microcontrollers with compatible Hardware Tools with this adapter board.

AVR Programming Adapter website - This webpage contains kit information, the latest user guide, and design documentation.
AVR Programming Adapter on Microchip Direct - Purchase this kit on Microchip Direct.
MPLAB® Development Ecosystem - Debugger/programmer hardware tools for AVR®.