CMD-711EX AXIOM, CMD-711EX Datasheet - Page 15

• Manufacturer Part Number: CMD-711EX
• Description: Microprocessor Development Tool
• Manufacturer: AXIOM

Specifications of CMD-711EX

• Silicon Manufacturer: Freescale
• Kit Contents: Board
• Silicon Family Name: 68HC11E
• Silicon Core Number: MC68HC11E9FN, MC68HC11E20FN
• Development Tool Type: Hardware - Eval/Demo Board
• 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 AX11E development system.
Troubleshooting, which will have the most complete and updated information. There also may be a newer version of
the software available. You can download the latest software from the Support section of our web page at:
Programming Utilities
Code Execution
www.axman.com
If you're using External EEPROM (default) the ROMON bit in the Configuration Byte must be DISABLED
(off). If you're using Internal (onchip) EPROM the ROMON bit must be ENABLED (on).
If you’re trying to program or read memory, make sure all the MODE switches are set properly and the
Configuration Byte is programmed to the proper value. Usually, this means Mode Switches 1 & 2 on for
external programming, 1,2,7 & 8 on for internal memory.
Always turn off VPP after programming (switch 8). This will prevent possible damage to the micro.
If you’re trying to execute a program, for example running the Debug Monitor from the Terminal window,
the MODE Switches must be reset to normal mode. Usually this means all switches OFF, however
check the MODE Switch section if you’re not sure.
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.
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 in the DOS utilities you can modify it’s operation by
editing the file DO_ASM.BAT in the AX11E directory. This can also be done from the Options menu.
Always remember to move the MODE switches back to their correct positions after programming
memory.
Make sure the ROMON configuration bit is set properly - see above.
If you programmed your code into EEPROM memory over the Debug Monitor you will have to re-
program the monitor software from the S19 file on the software disk to use it again.
After programming your application into memory, if it still doesn’t run, check the HC11 reset vector
located at FFFEh - FFFFh. These 2 bytes contain the address where execution will begin when the unit
is powered on.
If your program worked previously under the debug monitor but does not work after programming it,
check all the hardware registers you are using for proper configuration. The monitor initializes some of
these registers for it's own use - such as the serial port, stack pointer, timers, etc. You must initialize any
used peripheral registers in your own code.
This information is also available in the online help under
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