Template: R3 PLUS Spec
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Feature
- High performance, low power Atmel AVR 8-bit microcontroller family chips.
- Advanced RISC architecture.
- Up to 20mips throughput at 20MHz.
- 32KBytes of in-system programmable Flash program memory.
- 2KBytes of internal SRAM.
- Flexible power supply options:
- USB power supply; - External input power VIN (6V<=VIN<=12V).
- 4 LEDs:
- Power indicator PWR, USER LED, serial receive indicator RX and transmit indicator TX;
- External high-speed crystal oscillator:
- 16 MHz crystal oscillator.
- USB to the virtual serial port.
- ICSP interface, used as SPI interface.
Hardware
- ATMEGA328P-AU
- AMS1117-3.3
- 3.3V voltage regulator
- NCP1117ST50T3G
- 5V voltage regulator
- FT232RL
- USB to UART convertor
- Arduino interface
- compatible with standard Arduino interface with two additional analog inputs A6 (config the CFG), A7
- solder pads provided, supports prototype breadboard
- ICSP interface
- MICRO USB connector
- for uploading program OR serial port debugging
- Power output header
- 3.3V OR 5V, voltage level configured by the onboard power configuration switch, used as power output OR common-grounding with other boards
- FT232 pins
- for burning Bootloader into the microcontroller
- DC input
- 7V ~ 12V
- Reset button
- Power indicator
- Serial port Rx/Tx indicator
- User LED
- 500mA fast auto-recovery fuse
- Power configuration
- for configuring the operating voltage
- Bootloader selection switch
- turn ON: the board will reset when power-up OR other USB devices were detected connecting to the PC
- turn OFF: the onboard program runs immediately when power-up, and the board will not reset when other USB devices were detected connecting to the PC