UPDI Programmer

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The UPDI programmer is a serial based programmer.

You need to select 115200 BAUD and the COM port which is connected to the UPDI interface.


The UPDI interface is very simple : all you need is a TX, RX and a resistor.

Connect TX from the PC UART to a 4K7 resistor. The other side of the resistor is connected to the PC RX and to the UPDI pin of the processor.

We use DTR to switch the TX and RX from the PC to the processor. This allows to use the PC COM port to be used for serial communication and as a UPDI programmer.


The programmer works similar as the other supported programmers : you can program the FLASH, EEPROM and the fuse/lock bytes


In version 2082 you can only READ out the fuse bytes.