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The Arduino Nano is an open-source breadboard-friendly microcontroller board based on the Microchip ATmega328P microcontroller (MCU) and developed by Arduino.cc and initially released in 2008. It offers the same connectivity and specs of the Arduino Uno board in a smaller form factor.
A Queued Serial Peripheral Interface (QSPI; different to but has same abbreviation as Quad SPI described in § Quad SPI) is a type of SPI controller that uses a data queue to transfer data across an SPI bus. [19] It has a wrap-around mode allowing continuous transfers to and from the queue with only intermittent attention from the CPU.
An example SPI with a master and three slave select lines. Note that all four chips share the SCLK, MISO, and MOSI lines but each slave has its own slave select. Chip select (CS) or slave select (SS) is the name of a control line in digital electronics used to select one (or a set) of integrated circuits (commonly called "chips") out of several connected to the same computer bus, usually ...
Freeduino Nano is a low cost Arduino Nano compatible board with mini USB connector using SMD components Freeduino Nano. iDuino [173] [dead link ] A USB board for breadboarding, manufactured and sold as a kit by Fundamental Logic. IMUduino [179] ATmega32U4 Femtoduino.com [180] The world's first wireless 3D position, inertia, and orientation ...
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.
(The order in which the states are normally listed serves only to make the acronym "MOESI" pronounceable.) This protocol, a more elaborate version of the simpler MESI protocol, avoids the need to write a dirty cache line back to main memory when another processor tries to read it.
MOSI MISO SCK GND Vcc Type 2A (extended SPI) CS1 GPIO/INT MOSI GPIO/RESET MISO GPIO/CS2 SCK GPIO/CS3 GND GND Vcc Vcc Type 3 CTS/GPIO TxD RxD RTS/GPIO GND Vcc Type 3A (extended UART) CTS/GPIO GPIO/INT TxD GPIO/RESET RxD GPIO RTS/GPIO GPIO GND GND Vcc Vcc Type 4 DIR EN SenseA SenseB GND Vcc Type 5 (dual H-bridge) DIR1 EN1 DIR2 EN2 GND Vcc
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 programming adapter.