Hi everybody,

I just created my own at89s8252 board and it seems to work properly but...

1./ programming my board is very quick (not a second!) is it ok doc?

2./ once programmed, i just can't see the LEDs blinking, actually they stay on...For example if i want to blink P2.1 it will only turn P2.1 on but no squarred signal...(only dc? or is it blinking so fast i just can't see?)

3./ i need to reset my board 3 or 4 times (without the LPT1 plug) before getting into the software i just programmed and see my p2.1 on...otherwise i got some funny result on the leds (1111111,00000000, 11110011,...)
I think the program is still in flash but hard to start..

4./What about the ISP lock bytes (bits?), how and why programming them?

Are those trouble normal?

I am mainly suspecting my 11.0 MHz (and two 27pF capa) quartz not to work properly or the clock signal to be bad ...can i probe it with a scope? (i wouldn' t do that!)
Or is it my reset button that doesn't make a good reset signal?
can my at89s8252 be dead or the fact that it responds to your ispdos means that it is ok?

Do you suggest some small test? little tricks?

Thank you
Ben