Ok, so I decided to build a LC meter based on 89c2051 microcontroller. I have 35 yrs experience in electronics and I have limited experience flashing at90s2313 with a home made programmer.
So I made the python programmer and used py2051.exe to program the 89c2051. see
I cannot get the blink led test circuit to work.... I do get a burn success message but very very fast! If I for eg, left the chip out it gives an error msg, likewise if I unplug the power, likewise if I unplug the 25pin printer cable... so it seems to be doing something. I am using a celeron d processor at 2.9g hz and win XT
Maybe my computer is too fast?
Also the circuit is so very simple and basic..... but the only time I can get oscillation is by using a 4 mHz xtal . 10mHz and 11.05mHz xtals show a flat oscilloscope trace. Also only pin 4 shows oscillation never pin 5. Is this normal? Should a chip whether programmed or not show a clock pulses (oscillation) ? Maybe I have bad chips? I bought them from Digikey. This is very frustrating for me with all my electronic backgnd... but I can bear it (smile)
All I want is to be able to program a chip just to use in my LC meter circuit..
Thanks for any reply....