above picture shows the MicroDragon project module which includes the 9s12 MCU, MC9S12DG256CPVE.
The price also includes 4 of 14x2 male
headers and 4 of 14x2 female receptacle sockets.
This module is basically an adapter that converts a surface mount device (
112-pin MCU ) to a through hole device. It's used as a core module in a
HCS12 / 9S12 project. It's designed to be used in senior
projects made by students who already have some good experiences in the HCS12 /
family. This is not something for learning embedded programming. If you should consider yourself a novice, we recommend you purchase the
Dragon12 Plus2 instead.
- 16 MHz crystal, 8 MHz default bus speed and up to 25MHz bus speed
- Pre-installed with Serial
Monitor for CodeWarrior
- 91 of MC9S12DG256 I/O pins are accessible on male header connectors for
- On-board BDM-in connector to be connected with a BDM from
multiple venders for debugging
- Besides the on-chip 256K flash, 12K RAM and
4K EEPROM, the MC9S12DG256 MCU also includes the following on-chip peripherals:
- 3 SPIs
- 2 SCIs
- 2 CANs
- I2C interface
- 8 16-bit timers
- 8 PWMs
- 16-channel 10-bit A/D converter
- SCI0 header for
connecting the SCI0 to a PC com port via Wytec's USB to TTL adapter
- I/O pin layout is identical to MiniDragon+
and MiniDraon Plus2
- Small PC board size 2.2" X 2.2"
circuitry of the MicroDragon module is very simple and you probably would know
how to use it by reading schematics.
provides a fast way to make your own HCS12 / 9S12 prototype board since you
don't have to deal with any problems of soldering a 112-pin LQPF SMD chip.
kit comes with a set of four 14x2 male headers and a set of four 14x2 female
connectors. You will have to decide which set is going to be soldered on the
module for your application.
The headers and their functions are listed below:
J1 --- BDM input and is used by
a BDM or a BDM POD for programming the on-chip flash memory or debugging code.
J2 --- 5V VCC and GND. It can
provide 5V for a target board or can be powered by an external regulated 5V,
never place a jumper on J3. In doing so you will make a short
circuit on the module.
If you make a carrier board for supplying 5V to
this module, the best way is to connect the external 5V to pin 41 (VDDR) and
Ground to pin 40 (VSSR)
J3 --- SCI0 connector. It
provides TX and RX of the SCI0 in TTL level.
J4 --- It connects USB 5V to the
VCC of the module.
When using 5V from USB port via a UTA, you need to place a jumper on J4.
If you supply an external 5V to the MicroDragon module via J2, then
remove the jumper on J4.
J5 --- For selecting RUN or LOAD
The jumper is not installed when download or debug code using code
To run your code, you need to place a jumper on J5
J6 --- PAD0, it's located on
J7 --- PAD1, it's located on
solder side. When it's pre-installed with D-Bug12 monitor, you can short J6 and J7 to ground to enable
Three ways to power up the module:
Remove the jumper on J4, and connect an external regulated 5V DC to J2, the
LED indicator should blink at least twice.
Remove the jumper on J2 and place a jumper on J4, connect a UTA adapter to
J3, the USB port on laptop will provide 5V to the module and the LED
indicator should blink at least twice.
Remove the jumpers on J2 and J4, connect a BDM or a BDM POD to J1. The BDM
or BDM POD will provide 5V to the module and the LED indicator should blink
at least twice.
Freescale serial monitor or bootloader+D-Bug12 monitor is not installed
or erased by a BDM, the LED indicator will not blink during power up or
Three ways to develop code using the MicroDragon:
In the stand-alone configuration, the MicroDragon can be pre-installed with
serial monitor (at default) or D-Bug12 monitor (per customer's request), but
it requires a UTA adapter to interface with a PC.
If the MicroDragon is pre-installed with serial monitor and a test program
at factory, the state of the J5 is tested by the serial monitor for
selecting RUN or LOAD mode during power up or reset, and the LED indicator
will blink twice to indicate that the serial monitor is functioning. If
there is a jumper on J5 the monitor will wait for a command from PC. If
there is no
jumper placed on J5 the LEDs will flash 2 more times to indicate that the
program execution is diverted to user code. When the user code ( the
pre-loaded factory test program) is running the LED indicator will flash
The serial monitor works with Code Warrior IDE. For more information
about Code Warrior please visit:
Per customer's request it can be pre-installed with D-Bug12 monitor. Both the J6 and J7 on the solder side
are replaced by a 10K resistor so both the PAD0 and PAD1 are low and will run
D-Bug12 monitor. For operating all 4 modes, you need to change the states of
the PAD0 and PAD1 by connecting one of them, or both to VCC.
Another approach is to use your TinyBDM, or MiniDragon or Dragon12 plus as a
BDM POD and debug the MicroDragon via BDM connection, so you don't need to
buy a UTA.
In this setup, you are going to use D-Bug12 monitor to debug your code and the D-Bug12 monitor is located in the BDM POD, all flash
memory of the chip can be used for user programs.
The last approach is to purchase the Multilink, a USB based BDM, from P & E
Microsystems. It will cost you $99, but it offers more features.
You should use a non-clean type solder when soldering the male headers or
female sockets. The residual of non-clean solder flux won't be washed away
by water, but will not harm the board if it's left on the module. If you
would like to clean your module after soldering, you can use alcohol to
clean up residue and use a air compressor or even a hair dryer to blow away
If you use a water soluble type solder, you need to wash your module in warm
water ASAP after soldering. If solder residue is left on the module too long
it will cause corrosion on the module. If it's not washed thoroughly, any
small amount of residues will also cause corrosion on the module in the
|The price includes the
module and four of 14x2 male headers and four of 14x2 female receptacle sockets to be used in a user
application target board.
MC9S12 / 9s12 project module
Educational discount price for schools, students
||The price includes the
USB to TTL Breakout module, an 4x2 IDC cable.