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The above picture shows the TinyDragon project board which includes the 9S12 MCU, MC9S12DG256CFUE. 

This board is designed to be used in senior projects made by students who already have some good experiences in the HCS12 / 9S12 family. This is not something for learning embedded programming. If you should consider yourself a novice, we recommend you purchase the Dragon12 Plus instead. 

When the board is pre-installed with serial monitor, the state of the slide switch (S3) is tested by the serial monitor for selecting RUN or LOAD mode during power up or reset, and the LED indicator (PE5) will blink twice to indicate that the serial monitor is functioning. If the slide switch is placed in "LOAD" mode the monitor will wait for a command from PC. If the slide switch is placed in "RUN" mode the LED will blink two more times to indicate that the program execution is diverted to the user code.

If the serial monitor is not installed or is erased by a BDM, the LED indicator will not blink during power up or reset.

Features:

• 8 MHz crystal, 4 MHz default bus speed and up to 25MHz bus speed via PLL
• A slide switch for selecting RUN/LOAD mode. 
• 1 pushbutton switch
• 1 LED indicator
• Power-On LED indicator
• Pre-installed with Serial Monitor for CodeWarrior
• 51 of MC9S12DG256 I/O pins are accessible on male header connectors for user applications 
• BDM-in connector to be connected with a BDM from multiple venders for debugging
• Fast SPI expansion port for interfacing external SPI devices
• I2C port
• 5 ports, port A, B, P, T, Analog, with 10-pin male headers, 
• Reset switch
• Besides the on-chip 256K flash, 12K RAM and 4K EEPROM, the 9s12 MCU, MC9S12DG256, also includes the following on-chip peripherals:
  
  • 3 SPIs
  • 2 SCIs
  • 2 CA Ns
  • I²C interface
  • 8 16-bit timers
  • 7 PWMs
  • 8-channel 10-bit A/D converter
    
• SCI0 header for connecting the SCI0 to a PC com port via the FT232RL based USB to TTL adapter
• SCI1 header for user's applications
• DC jack for AC adapter or a 2-position header for external battery in robot applications
• Powered by a USB port or an AC/DC adapter
• Includes a simple test program 
• Small PC board size 1.9" X 2.5"