stanzlavos
Newbie level 1
My motherboard is Asus M3A78-EM. It doesnt have a parallel port connection. However, it does have 25 pins on it marked LPT and it is said that with an adapter, it can be used as a normal parallel port.
I used to program my 89sXX microcontroller with the ISP flash porgrammer by Asim. Actually i had taken the connection on a bread board itself and worked fine.
Now I made an adapter which connects directly to the motherboard. And i took connections only from the required pins as described in the circuit diagram that i was following. Now when i place a microcontroller, and try to retrieve its signature, it shows different values and once in a while it shows the correct device signature. But then again, when i try to burn, it tells that the signature didnt match.
This same setup was used earlier to program. And i am certain that i have taken the correct connections from the motherboard. (And it does retrieve the correct signature sometimes.). What could be the problem ?
Please help..
I used to program my 89sXX microcontroller with the ISP flash porgrammer by Asim. Actually i had taken the connection on a bread board itself and worked fine.
Now I made an adapter which connects directly to the motherboard. And i took connections only from the required pins as described in the circuit diagram that i was following. Now when i place a microcontroller, and try to retrieve its signature, it shows different values and once in a while it shows the correct device signature. But then again, when i try to burn, it tells that the signature didnt match.
This same setup was used earlier to program. And i am certain that i have taken the correct connections from the motherboard. (And it does retrieve the correct signature sometimes.). What could be the problem ?
Please help..