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Discussion Groups | M68HC11 | B600 ROM

Technical discussions about Freescale Microcontrollers: M68HC11. (Freescale Semiconductor is a Subsidiary of Motorola).

B600 ROM - shanedittrich - Jan 22 15:05:00 2005


Hi,
I have not tried to program the 68HC11 since I was in college (5
years ago). So today I have hooked everything up and I am able to
mess around with everything but I can not change any instructions in
the EEPROM B600. I know this is where the programs are usually
stored but how do I modify those addresses? I tried the ASM B600 and
then just tried to load some simple instructions, but it comes back
as -ROM.

Thanks in advance
Shane






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Re: B600 ROM - Steve Tabler - Jan 22 15:48:00 2005

Hi!

It "should" come back as ROM :)

You can't write to the internal EEPROM as if it were RAM. You need to use
an EEPROM-burning routine.
A procedure is given in various 68HC11 data sheets for accomplishing
this. You may also need to erase first, another
similar topic which is covered in the data sheets.

Steve At 08:05 PM 1/22/2005 +0000, you wrote: >Hi,
>I have not tried to program the 68HC11 since I was in college (5
>years ago). So today I have hooked everything up and I am able to
>mess around with everything but I can not change any instructions in
>the EEPROM B600. I know this is where the programs are usually
>stored but how do I modify those addresses? I tried the ASM B600 and
>then just tried to load some simple instructions, but it comes back
>as -ROM.
>
>Thanks in advance
>Shane




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