EZoFlash форум

Forum ,

I need some help with the programming of atmega's

I have the problem that for example an atmega8 will fail its verification .
When looking at the data IN the atmega8 i see FFFF at several addresses instead of the data which is supposed to be .

In an attempt to try to find the problem i verified all atmega's on another programmer and they allverify allright , thus the problem must be the willem .
Then i verified the willem programmers socket line per line with my error-detection-tool and in the programmers socket all lines verify allright.
Then i took an 512 eprom and programmed it with the data of the atmega flash , and that verified allright.
So as a conclusion i think the problem is in the circuit part towards the socket 25Cxx.

Is there anyone who can shine a light on this weird problem ??

Components T1 , T5 , U12 ( 74hc540 ) , are in the circuit of DATA2 ( ser in on 25Cxxx ) could they cause an intermittent problem ??
As far as i can see the signal goes directly from the paralleport through these components .

Or will the paralleport itself be the reason ??



techy

I have exactly the same problem. I figured out that there is already someone ???

Hi
If you open the conf and the back up in note pad find the atmega32 bit, then look for the eprom and flash parts you will see I changed the delays from 6 to 10 and from 10 to 20, as some avrs are fussy about the programming speeds
Glad it worked

Regards
Dazz