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GETTING STARTED
The Axiom CML12S-DP256 single board computer is a fully assembled, fully functional
development system for the Motorola MC9S12DP256 microcontroller. Provided with wall plug
power supply and serial cable. Support software for this development board is provided for
Windows 95/98/NT/2000/XP operating systems.
This development board applies option selection jumpers. Terminology for application of the
option jumpers is as follows:
Jumper on, in, or installed = jumper is a plastic shunt that fits across 2 pins and the
shunt is installed so that the 2 pins are connected with the shunt.
Jumper off, out, or idle = jumper or shunt is installed so that only 1 pin holds the shunt,
no 2 pins are connected, or jumper is removed. It is recommended that the jumpers be
idled by installing on 1 pin so they will not be lost.
Development board users should also be familiar with the hardware and software operation of
the target HCS12 device, refer to the Motorola User Guide for the device and the CPU12
Reference Manual for details. The development board purpose is to assist the user in quickly
developing an application with a known working environment or to provide an evaluation
platform for the target HCS12. Users should be familiar with memory mapping, memory types,
and embedded software design for the fastest successful application development.
Application development maybe performed by applying the embedded MON12 (
default
) or
NOICE firmware monitors, or by applying a BDM cable with supporting host software. The
MON12 monitor provides an effective debug method for assembly level software, but has
limitations in C code developments. For C/C++ code development it is recommended that
source code or symbolic debug capability be provided in the debugging environment. The
NOICE monitor or BDM interface with supporting software tools should be applied for C/C++
code development so the host PC can provide the symbolic support needed. User should
verify the NOICE or BDM development environment supports the C compiler to be applied, not
all development environments support all compilers.
The MON12 and NOICE monitors are provided in the development board HCS12 internal flash
memory and apply some HCS12 resources for operation. See the respective chapter for each
monitor for details on operation and resources applied. User should note both monitors apply
operation of the HCS12 expanded wide mode data and address bus on HCS12 I/O ports A, B,
E, and K for access to the external Ram. The external ram provides a development memory
where code to be debugged can be loaded or modified quickly and software breakpoints
applied. After the application is tested, the code can be relocated to the internal flash memory
space of the HCS12 and programmed into the flash memory for dedicated operation.
User applications developed by applying MON12 or NOICE monitors can be modified and
relocated for operation as a stand-alone application. By applying the MON12 Autostart
feature, the user application will operate from Reset or Power on conditions to provide a
dedicated operation of the application. See the Autostart section in this manual for more
information.
Follow the steps in this section to get started quickly and verify everything is working correctly.
