HI, I have made a small program on 89c51 to light an led..the entire setup is made on a breadboard.. but there is no response or proper output.
The same 89c51 is working on my project kit accurately.
what is the issue with bread board and 89c51?
the entire setup is made on a breadboard.. if that is a "solderless breadboard" THROW IT OUT
what is the issue with bread board and 89c51? any signals with fast risetimes are critical (regardless of 8051 or not), a carefully made breadboard with VERY short connecting wires and proper decoupling MAY work. Just to illustrate: may printed circuits that are not 4 layer have problems too.
Erik
When designing with a breadboard, it is usually best to design with a chip with PLL so an external crystal can run at a quite low frequency, or to use an internal RC oscillator.
Then you can usually get quite good function, as long as you do not need high-quality analog sections - for example many bits of precision on ADC.
Thanks..i hav got it work ..though not entirely..need to amplify some outputs... its like a miracle..it worked today after more than two weeks of failure..