![]() ![]() Secondly, most of the ATtiny do not have serial hardware, so it would make not sense to install a bootloader if it doesn’t help to do uploads via serial port. The first is the small memory of this microcontroller (ATtiny85 has 8Kb compared to 32Kb of the Atmega328). There are perhaps some ATtiny bootlaoders, but it doesn’t make sense to load them for several reasons. So this is a first difference with the ATmega328. Let’s start with a premise: on the ATtiny we will not upload the bootloader, but we will proceed to load our sketch directly into the memory of the microcontroller. Obviously, everything can be done using a dedicated programmer, but here we will not talk about this subject because the differences are minimal. In this article we will see how to program some of the Atmel ATtiny family, particularly those highlighted in the title, using Arduino libraries and Arduino Uno as ISP.
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