Hi, all.

I have a simple eval board based on AT89S8252 and a serial ISP interface. I'm using a PonyProg tool for programming, but since some time it doesn't work at all. If I'm trying to read the chip, PonyProg says, that reading succesfull, but all the read bytes are 00. If i'm trying to write the device, the system says that there is no response from device. All tests fails. Can anybody help me?

Thanks.
--
Fox