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2.  Arduino Due Board provides clock pulses of 3.579 Mhz frequency .
 Arduino Due Board are very common and inexpensive they are used in
many other applications, for example DTMF generators.
 It uses the mechanical resonance of a vibrating crystal of piezoelectric
material to create an electrical signal with a very precise frequency.
 This frequency is commonly used to keep track of time to provide a
stable clock signal for digital integrated circuits and to stabilize
frequencies for radio transmitters and receivers.
 It is the first Arduino board based on a 32-bit ARM core microcontroller .
 The board contains everything needed to support the microcontroller,
Simply connect it to a computer with a micro-USB cable or power it with
a AC-to-DC adapter or battery to get started.
 The Due is compatible with all Arduino shields that work at 3.3V and are
compliant with the 1.0 Arduino pinout.
 The Arduino Due can be powered via the USB connector or with an
external power supply.

4.  A 32-bit core, that allows operations on 4 bytes wide data within
a single CPU clock.
 SRAM : 96 KBytes
 Flash memory : 512 KBytes
 Microcontroller: AT91SAM3X8E.
 Operating Voltage: 3.3V.
 Input Voltage (recommended): 7-12V.
 Digital I/O Pins: 54 (of which 12 provide PWM output).
 Analog Input Pins: 12.
 Analog Outputs Pins: 2 (DAC).
 Flash Memory: 512 KB all available for the user applications.
 SRAM: 96 KB (two banks: 64KB and 32KB).
 Clock Speed: 84 MHz.
 The Arduino Due is a microcontroller board based on the Atmel
SAM3X8E ARM Cortex-M3 CPU.
 It is a common clock for HT9170B DTMF decoder.

6.  ARM based Prototyping Board.
 Multiple Projects requiring High speed Operations.
 Multiple DIY projects having larger code size.
 ARM based Robot.

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