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2. In-system programming - Wikipedia

   en.wikipedia.org/wiki/In-system_programming

   However, there is room for confusion. The PIC data sheets show an inverted socket and do not provide a pictorial view of pinouts so it is unclear what side of the socket Pin 1 is located on. The illustration provided here is untested but uses the phone industry standard pinout (the RJ11 plug/socket was original developed for wired desktop phones).

3. AVR microcontrollers - Wikipedia

   en.wikipedia.org/wiki/AVR_microcontrollers

   6- and 10-pin ISP header diagrams. The in-system programming (ISP) programming method is functionally performed through SPI, plus some twiddling of the Reset line. As long as the SPI pins of the AVR are not connected to anything disruptive, the AVR chip can stay soldered on a PCB while reprogramming. All that is needed is a 6-pin connector and ...

4. Atmel AVR instruction set - Wikipedia

   en.wikipedia.org/wiki/Atmel_AVR_instruction_set

   The Atmel AVR instruction set is the machine language for the Atmel AVR, a modified Harvard architecture 8-bit RISC single chip microcontroller which was developed by Atmel in 1996. The AVR was one of the first microcontroller families to use on-chip flash memory for program storage.

5. ATmega88 - Wikipedia

   en.wikipedia.org/wiki/ATmega88

   8-bit AVR 8-bit AVR Performance: 20 MIPS at 20 MHz [3] 20 MIPS at 20 MHz [3] Flash memory: 8 KB 16 KB SRAM: 1 KB 1 KB EEPROM: 512 B 512 B Pin count: 28 or 32 pin: 28 or 32 pin: Maximum operating frequency: 20 MHz 20 MHz Hardware QTouch Acquisition: No 20 MHz Maximum I/O pins: 23 23 External interrupts: 2 2 USB Interface: No No USB Speed – –

6. ATmega328 - Wikipedia

   en.wikipedia.org/wiki/ATmega328

   ATmega328 is commonly used in many projects and autonomous systems where a simple, low-powered, low-cost micro-controller is needed. Perhaps the most common implementation of this chip is on the popular Arduino development platform, namely the Arduino Uno, Arduino Pro Mini [4] and Arduino Nano models.

7. ATtiny microcontroller comparison chart - Wikipedia

   en.wikipedia.org/wiki/ATtiny_microcontroller...

   ATtiny (also known as TinyAVR) is a subfamily of the popular 8-bit AVR microcontrollers, which typically has fewer features, fewer I/O pins, and less memory than other AVR series chips. The first members of this family were released in 1999 by Atmel (later acquired by Microchip Technology in 2016).