CME-12B32 AXIOM, CME-12B32 Datasheet - Page 15

• Manufacturer Part Number: CME-12B32
• Description: Microprocessor Development Tool
• Manufacturer: AXIOM

Specifications of CME-12B32

• Silicon Manufacturer: Freescale
• Kit Contents: Board
• Silicon Core Number: 68HC12B32
• Memory Organization - Flash: 32 KB
• Development Tool Type: Hardware - Eval/Demo Board
• Clock Frequency: 16MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Tips and Suggestions
Following are a number of tips, suggestions and answers to common questions that will solve most problems users have
with the AX12 development system. This information is also available in the AX12 program under Troubleshooting, which
will have the most complete, updated information. There also may be a newer version of the AX12 utility software
available. You can download the latest version for FREE on our web page at: WWW.AXMAN.COM
AX12 Program
Code Execution
If you’re trying to program memory or start the HC12 Utilities, make sure all jumpers are installed.
Be certain that the data cable you’re using is bi-directional and is connected securely to both the PC and the
board. Also, make sure you are using the correct serial port.
Make sure the correct power is supplied to the board. You should only use a 9 volt, 300 mA adapter or power
supply. If you’re using a power strip, make sure it is turned on.
Make sure you load your code to an address space that actually exists. See the Memory Map if you’re not sure.
Make sure you're not over-writing memory used by the monitor program.
If you’re running in a multi-tasking environment (such as Windows™) close all programs in the background to be
certain no serial conflict occurs.
If the Assembler menu option doesn’t work properly on your system you can modify it’s operation by editing the
file DO_ASM.BAT in the AX12 directory. This can also be done from the Options menu.
You can reset all AX12 configuration options to their original state by deleting the file named AX12.CFG. This file
will be re-created the next time you run AX12.
Make sure ALL jumpers are set correctly according to your board’s configuration. Read the hardware manual
section on jumpers carefully if you’re not sure.
To execute in single chip mode, remove both MOD jumpers.
If you’re using D-Bug12 breakpoints may not be acknowledged if you use the CALL command. You should use
one of the GO command instead. This should be fixed in a later version.
If you programmed your code into internal flash memory over the Debug Monitor and it doesn’t run check the
HC12 reset vector located at FFFEh - FFFFh. These 2 bytes contain the address in the micro. where execution
will begin when the unit is powered on.
When running your code stand-alone, you must initialize ALL peripherals used by the micro, including the Stack,
Serial Port, etc.
You must either reset the COP watchdog timer in the main loop of your code or disable it when not running under
MBug or BDM mode. The micro enables this by default and if you don't handle it your code will reset every
couple of ms.
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