The MPLAB® PICkit™ 4 is a fast debugger for board programming. It's more user-friendly than its predecessor PICkit3 with a wider target voltage and an additional micro SD card slot.
The MPLAB® PICkit™ 4 In-Circuit Debugger/Programmer by Microchip Technology allows faster and easier debugging and programming of PIC®, dsPIC®, AVR, SAM, and CEC flash microcontrollers and MPUs than its predecessor PICkit 3, using the powerful graphical user interface of MPLAB X Integrated Development Environment (IDE), starting with version 4.15. The MPLAB PICkit 4 is connected to the design engineer's computer using a high-speed 2.0 USB interface and can be connected to the target via an 8-pin Single In-Line (SIL) connector. The connector uses two devices I/O pins and the reset line to implement in-circuit debugging and In-Circuit Serial Programming™ (ICSP™). An additional micro SD card slot and the ability to be self-powered from the target means you can take your code with you and program on the go.
The MPLAB PICkit 4 programs faster than its predecessor PICkit3 with a powerful 32 bit 300MHz SAME70 MCU and comes ready to support PIC®, AVR, SAM and dsPIC® MCU devices, and MPU devices. Along with a wider target voltage, the PICkit 4 supports advanced interfaces such as 4-wire JTAG and Serial Wire Debug with streaming Data Gateway, while being backward compatible for demo boards, headers and target systems using 2-wire JTAG and ICSP. The PICkit 4 also has a unique programmer-to-go function with the addition of a micro SD card slot to hold project code and the ability to be powered by the target board.
If you have MPLAB X IDE installed, you can browse to the “docs” folder under your MPLAB X installation directory and open the file “Device Support.htm”. Alternatively, you can download it from this link.