Here are some useful links regarding the P89V51RD2 / P89LV51RD2 microcontrollers:
P89V51RD2P89V51RC2P89V51RB2 (5V Operation)
P89LV51RD2P89LV51RC2P89LV51RB2(3V Operation)
Copyright 2008 LPC Tools, All Rights Reserved.