connection problem

[daniel]

We have a robot,
it uses max232 to connect the seriel programmer of p89c51rc2bn
we used erase  and it hang-
and from that moment the chip is not responding.

can you   help me?

[Adi]

i

[Andy Ayre]

Daniel - it could be any number of reasons. The most likely one is the reset problem described on the errata sheet for that device. Please give that a try and if it doesn't work then look at the "What to do if ISP does not work" application note on the Flash Magic web page. The steps in the app note will help you and me to narrow the problem down.