There goes my first BX24...

Started by David Sousa Mendes May 5, 2005
Hello
My BX24 was also damaged yesterday.
Every time I try to download the program, I get the following error message:
Error verifying external EEPROM
Data error at address 0:
Expected value: 111
Actual value: 21

Could one of this two following situations be the reason for the problem?
1- I had pin 3 (atn), connected to the input of a 7805 voltage regulator and the output of the voltage regulator was being used as (0-5V) signal input in pin 10...
2- I'm recording data to the EEPROM from start address 9000 and end address 32000
When I compile, the information I get is:
Compiled OK, Code: 5671 bytes, RAM: 218 bytes, PRS: 0 bytes
..so, I wouldn't suspect any conflit between code and data... Is there a way of recovering those addresses?
OR... Is my BX24 for garbage?

David



David;

I had an EEPROM go bad on me, it became unreliable, then completely
bad. I could save data like you do in the unused area, but only about 10%
was correct. The last program I had sucessfully downloaded was still
running (and saving data.) I was able to replace it with an external
EEPROM. First I replaced it with a 64K EEPROM; it worked, but the only one
single thing that doesn't work with a 64K EEPROM is PutEEPROM, which I
needed for my application. Then I put an external 32K EEPROM and
everything is back on track.

If it comes to it I can show you pictures of how I did it. Before you
do that however, make sure you have "32K" selected on the Chip settings
screen. The 32K setting only works with the 32K EEPROM (and 64K for the
64K of course.) The two chips have different programming protocals,
despite having the exact same pin-out. If you have the wrong one selected
it ain't going to work! Good Luck!
Ken_S.

At 05:24 AM 5/5/2005, you wrote:
>Hello
>My BX24 was also damaged yesterday.
>Every time I try to download the program, I get the following error message:
> Error verifying external EEPROM
> Data error at address 0:
> Expected value: 111
> Actual value: 21
>
>Could one of this two following situations be the reason for the problem?
>1- I had pin 3 (atn), connected to the input of a 7805 voltage regulator
>and the output of the voltage regulator was being used as (0-5V) signal
>input in pin 10...
>2- I'm recording data to the EEPROM from start address 9000 and end
>address 32000
>When I compile, the information I get is:
> Compiled OK, Code: 5671 bytes, RAM: 218 bytes, PRS: 0 bytes
>..so, I wouldn't suspect any conflit between code and data... >Is there a way of recovering those addresses?
>OR... Is my BX24 for garbage?
>
>David >
>
>Yahoo! Groups Links >
>