Now that we have seen a little bit about ATtiny85 Microcontroller and its development board, lets dig into the aspects of how to use this board, what are the necessary tools (like Drivers) required and also how to program the ATtiny85 Microcontroller. One such board is shown in the image below.Īs you can see, apart from the ATtiny85 Microcontroller IC, there are a few other components on the board like a 5V Regulator, headers for I/O pins, few passive components and a MicroUSB port for programming and power supply. Several manufacturers started developing tiny development boards with ATtiny85 as the main controller.
The following image shows the list of alternative functions on the PORTB pins. All the 6 port B have multiplexed operations with each pin capable of handling 3 or more operations. PORTB (PB0 – PB5): The rest of the 6-pins in ATtiny85 are Port B Pin. For ATtiny85 running at a speed of 10-20MHz, the supply voltage should be in the range of 2.7V – 5.5V. The following image shows the Pin Diagram of an 8-pin SOIC ATtiny85.įrom the above pin diagram, you can observe that except for VCC and GND, rest of the 6-pins of ATtiny85 are multiplexed with multiple functionalities. The main difference between these three ICs is the amount of memory each device has (Flash, EEPROM and RAM).ĪTtiny85 Microcontroller, the target device of this project has 8KB of In-system programmable Flash, 512B of EEPROM and 256B of SRAM.Īs mentioned earlier, ATtiny85 is an 8-pin Microcontroller and the most common IC package for ATtiny85 is the 8-pin SOIC. There are three variants of ATtiny85: ATtiny25, ATtiny45 and ATtiny85. Physically, it needs only 8-pins for complete operation (although some packages like QFN16 use 16-pins just for packaging).
It is an 8-bit Microcontroller based on the AVR RISC Architecture. The ATtiny85 Microcontroller is possibly the smallest Microcontrollers available today.
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