How did you get to this conclusion?

Their parts search produced no results when fed with "89V51RD2". I guess I should have tried "P89V51RD2", but since I oddly enough (1) never used any Philips/NXP parts at work, I'm not familiar with their exact naming scheme.

You somehow dug out datasheet version 1 which did not contain this information, but that was superseded in already.

Guilty as charged. After not finding the right chip on nxp.com, I tried my luck in Keil's device database. And their datasheet is from 2004 indeed.

Thanks for clearing this up. I feel really silly now.




(1) Yes, I work for Philips.