Here you can learn many more interesting and useful about USB bootloaders for AVR microcontrollers. In practice, one of the most proper microcontroller programming method is using a bootloader program ...

This ATMega328 chip holds a pre-burned bootloader, allows you to upload code without using any additional hardware. So if you are in a plan to make your own open source microcontroller platform – ...

AVR microcontrollers without a bootloader must be programmed through the SPI, as described above. All microcontrollers (at least, those with datasheets) have a pinout schematic and pin description.

That’s where the UART bootloader comes in: it will allow [Thomas] to program the port-expander RP2350 using the main microcontroller.

There are a few different ways of getting firmware onto one of AVR’s ATtiny85 microcontrollers, including bootloaders that allow for firmware to be updated without the need to plug the chip i… ...