High Voltage Serial Programming Attiny
T his arduino sketch is useful for rescuing attiny microcontrollers rendered useless by incorrect fuse settings.
High voltage serial programming attiny. Using wayne holder s excellent attiny fuse reset posts as a starting point this little device is able to reset the fuses on many attiny devices. High voltage serial programming hvsp is the high voltage protocol for 8 and 14 pin attiny mcus. It does this by putting the bricked tiny into high voltage serial programming mode and writing the fuses to safe values. Atmel attiny datasheet chapter high voltage serial programming describes alternative way of programming attiny microcontroller.
Just build a small circuit plug it into arduino board upload a sketch and you are good to go. This simple and inexpensive high voltage avr programmer for attiny chips requires only an attiny85 and a few components to build. With this mechanism it is possible to bring the mcu back to life. You don t need to purchase a hvp high voltage programmer or search for an old pc with parallel port to recover attiny.
A similar result if you include dwen. Included is a bit rstdisbl after this chip is not available for high voltage serial programming. Arduino high voltage programmer eraser for attiny based on recover bricked attiny using arduino as high voltage programmer this program restores the default fuse settings of the attiny and can perform a chip erase lock bits reset. Connecting your standard arduino hvsp requires 7 signals including power and ground as shown in this illustration.
At attiny13 factory settings fuse bits.