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These pins are connected to the corresponding pins of the FTDI USB-to-TTL serial chip. By sliding the switch (S1), RX/TX pins can be re-routed to Bluetooth UART connector. Linduino One ATmega328 Linear Technology Corporation [70] Compatible with Arduino Uno. Galvanically isolated USB interface provided by onboard LTM2884 USB Isolation module.
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.
Serial / UART: pins 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the ATmega8U2 USB-to-TTL serial chip. External interrupts: pins 2 and 3. These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value.
Serial communication on pin D0 (RX) and pin D1 (TX). used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the FTDI USB-to-TTL Serial chip. By sliding the switch (S1), RX/TX pins can be re-routed to Bluetooth UART connector. Linduino One Linear Technology Corporation [60] Yes ATmega328 16 MHz
TTL serial refers to single-ended serial communication using raw transistor voltage levels: "low" for 0 and "high" for 1. [31] UART over TTL serial is a common debug interface for embedded devices. Handheld devices such as graphing calculators and NMEA 0183 -compliant GPS receivers and fishfinders also commonly use UART with TTL.
The default bootloader of the Arduino Uno is the Optiboot bootloader. [33] Boards are loaded with program code via a serial connection to another computer. Some serial Arduino boards contain a level shifter circuit to convert between RS-232 logic levels and transistor–transistor logic level signals.
debugWIRE is supported by all modern hardware debuggers from Microchip.This includes Atmel-ICE, [3] JTAGICE3, AVR Dragon, JTAGICE mkII, and SNAP. [4] It is also possible to build a cheap debugWIRE hardware debugger [5] based on an open-source Arduino sketch, [6] using a general USB-Serial adaptor or ATtiny85 board, [7] or a CH552 microcontroller.
The AVR Dragon provides in-system serial programming, high-voltage serial programming and parallel programming, as well as JTAG or debugWIRE emulation for parts with 32 KB of program memory or less. ATMEL changed the debugging feature of AVR Dragon with the latest firmware of AVR Studio 4 – AVR Studio 5 and now it supports devices over 32 KB ...