What I mean by somewhat is that, unless you have a high-voltage programmer to reset the fuses, or an external clock to connect to the chip, you will be unable to use it. NOTE: be careful to NOT select external clock unless you have actually connected an external clock. This will set the fuses on the chip so that it runs at the selected clock speed. One caveat of programming is, when using a brand new chip, or when changing the clock speed, you need to choose Burn bootloader from the menu. Instead, you will need to use the TinyWireM and TinyWireS libraries. The I2C is also a bit different and does not work with the standard Wire library. Most of the chips do not have support for hardware serial. For example, there are a limited number of ports and less available RAM. Once setup, programming is easy through the IDE and works like any other AVR with some minor limitations. Programming an ATtiny w/ Arduino 1.6 (or 1.0).Virtual Workshop: Program an ATTiny85 with Arduino.Programming ATtiny85 with Arduino Uno on Hackster.io.
INTERNI SERIAL HOW TO
There are also a lot of articles on how to use another Arduino, such as an Uno, the program these MCU's. I use the Tiny AVR Programmer from SparkFun which is designed specifically for the 8 pin chips. A programmer is needed to program these chips. It does not contain a bootloader or a USB interface. To use an ATtiny, you will need to have a way to program the chip.
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