Dear friends,
Can anyone tell me the difference between the controllers P89c51RD+ and P89c51rd2
There are quite a few differences and the best way to find them all is to compare the datasheets. I don't think the datasheets for the Rx+ family are available anymore from Philips because they are so old, but if you contact the supplier who sold you the devices or your local Philips rep, I'm sure they will have a copy.