Atmega High Voltage Serial Programming

Current version of avr hv support atmega series avr microcontrollers but it can also be used with attiny microcontrollers which having high voltage parallel.

Atmega high voltage serial programming.

Avr high voltage programming fuses rescue. The unified program and debug interface updi is a one wire interface for external programming and on chip debugging of newer attiny and atmega devices. While i was expecting this huge leap in schematics and what a hobbyist can do nowadays i stil. Share improve this answer.

Avr hv is high voltage parallel programmer for atmel avr series microcontrollers. This project is created so that if i could revert the reset fuse change and flash via spi again. You won t regret it. But save yourself some time and invest in a programmer debugger that has hvpp high voltage parallel programming and hvsp high voltage serial programming.

I ve studied electronics in college but that happened during the middle age 20yrs ago. If you really want to use high voltage serial programming to download a sketch then the instructions to implement a full blown programmer are documented in section 20 6 in the attiny85 datasheet. Compare with other high voltage programming options like atmel stk500 this programmer is simple to build less expensive and also easy to use with gui application over usb interface. Avr hv allows programming reading verifying and configuring avr microcontrollers with its high voltage programming interface and it connected to pc using usb interface.

With this mechanism it is possible to bring the mcu back to life. The recovery fuse programming process is easy. Atmel attiny datasheet chapter high voltage serial programming describes alternative way of programming attiny microcontroller. Note that this is not to be confused w the high voltage parallel programming used for 20pin devices i e.

The code in this project uses arduino nano to re program attiny85 microcontroller fuses to default values using the hvsp method. Hi that happened to my nano with atmega 328p using a usbasp programmer just checking the fuse settings to make a backup. Compare with other high voltage programming options like atmel stk500 this programmer is simple to build less expensive and also easy to use. Half a year ago i restarted one of my old passions electronics.

An 8 pin avr package does not leave many unique signal combinations to place the avr into. If you don t have stk500 you can try to build your own avr high voltage programmer using arduino like jeff keyzer did. High voltage serial programming hvsp is mostly the backup mode on smaller avrs.