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Overview of features
EsduinoXtreme comes equipped with a variety of interfaces and on-board resources. These include, but are not limited to, the following:
- 8 MHz crystal, providing a 4 MHz nominal bus speed, when enabled. This can be mutliplied by six, using the on-chip PLL, resulting in a 24 MHz bus speed
- 1 MHz internal oscillator is the default clock source following powerup, before the oscillator is enabled. This minimizes current draw and EMI.
- Memory resources: 240K Flash, 4K EEPROM, 11K RAM
- Operating voltage: 5V or 3.3V, jumper-selectable
- Power sources: via USB port by default; can be powered externally via optional input jack through the on-board 5V regulator using an external 6-12 VDC power source
- USB communication interface to host computer: via FTDI chip, utilizing microB USB connector
- User LED: red LED on DIG13 (Port J bit 0) available for application use
- On-chip development support: adaptation of Freescale AN2548 Serial Monitor
- BDM connector: 6-pin standard header enables the use of a separate BDM pod for for programming all Flash and EEPROM memories, and debugging programs in real-time
- Input/output headers: emulate the Arduino Leonardo pinout, with four of the signals user-assignable via jumper blocks
- Footrpint for optional user-installed SPI memory-device (EEPROM or Flash in SO-8 package)
- Optional header footprint for adding wireless communications via the Digi XBee module, using the Technological Arts ADXB adapter