I have prototyped the HVPROG introduced in https://mewpro.cc/en/product/hvp...
It supports all AVR programming protocols except UPDI.
I have tested ISP, HVPP, HVSP and they work perfectly.
The problem in TPI programming. Any programming command is executed successfully, but the problem is that each time I need to reset the microcontroller manually for the firmware to run.
I suspected the programmer's firmware not resetting the ATtiny20 (target microcontroller).
The connection I have applied is as follows:
I need help because I have an interview next month regarding programming protocols. Thanks.