8-bit AVR Microcontroller

Disabling

Provided that the NVM enable bit has been cleared, the TPI is automatically disabled if the RESET pin is released to inactive high state or, alternatively, if VHV is no longer applied to the RESET pin.

If the NVM enable bit is not cleared a power down is required to exit TPI programming mode. See NVMEN bit in TPISR – Tiny Programming Interface Status Register.