In addition, some pins have specialized functions: Serial: 0 (RX) and 1 (TX) Serial 1: 19 (RX) and 18 (TX) Serial 2: 17 (RX) and 16 (TX) Serial 3: 15 (RX) and 14 (TX) Used to receive (RX) and transmit (TX) TTL serial data (with 3.3 V level). They also have an internal pull-up resistor (disconnected by default) of 100 KOhm. Each pin can provide (source) a current of 3 mA or 15 mA, depending on the pin, or receive (sink) a current of 6 mA or 9 mA, depending on the pin. Input and Output Digital I/O: pins from 0 to 53 Each of the 54 digital pins on the Due can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. To erase, press and hold the Erase button for a few seconds while the board is powered. This will remove the currently loaded sketch from the MCU. It is possible to erase the Flash memory of the SAM3X with the onboard erase button. All the available memory (Flash, RAM and ROM) can be accessed directly as a flat addressing space. The available SRAM is 96 KB in two contiguous bank of 64 KB and 32 KB. The bootloader is preburned in factory from Atmel and is stored in a dedicated ROM memory. Memory The SAM3X has 512 KB (2 blocks of 256 KB) of flash memory for storing code. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. This regulator also provides the power supply to the SAM3X microcontroller. A 3.3 volt supply generated by the on-board regulator. Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. The board can be supplied with power either from the DC power jack (7 – 12V), the USB connector (5V), or the VIN pin of the board (7-12V). 5V.This pin outputs a regulated 5V from the regulator on the board. You can supply voltage through this pin, or if supplying voltage via the power jack, access it through this pin. The input voltage to the Arduino board when it’s using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). If using more than 12V, the voltage regulator may overheat and damage the board. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. The board can operate on an external supply of 6 to 20 volts. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector. The adapter can be connected by plugging a 2.1mm center-positive plug into the board’s power jack. External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The power source is selected automatically. The Arduino Due can be powered via the USB connector or with an external power supply. A DMA controller, that can relieve the CPU from doing memory intensive tasks. (for more information go to int type page). Microcontroller AT91SAM3X8E Operating Voltage 3.3V Input Voltage (recommended) 7-12V Input Voltage (limits) 6-16V Digital I/O Pins 54 (of which 12 provide PWM output) Analog Input Pins 12 Analog Output Pins 2 (DAC) Total DC Output Current on all I/O lines 130 mA DC Current for 3.3V Pin 800 mA DC Current for 5V Pin 800 mA Flash Memory 512 KB all available for the user applications SRAM 96 KB (two banks: 64KB and 32KB) Clock Speed 84 MHz Length 101.52 mm Width 53.3 mm Weight 36 g ARM Core BenefitsĪ 32-bit core, that allows operations on 4 bytes wide data within a single CPU clock. Technical specs AVR Arduino microcontroller
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