Where can I find ISP schematics of 89LV51RD2

[erikm]

I had an embedded board for P89V51RD2 (5V) and I 've modified it for P89LV51RD2 (3V)

sou8nds like you now have a 5V RS232 transciever running off 3V that will NOT work,

Erik

[6uoos]

Now ,I replaced RS232 by the new proper one (ICL3232) for 3.3V system but I cannot use the ISP mode at all. I 'm not sure that method  of ISP programming between  P89V51 and P89LV51 are similar.  
Do you have any idea ??  Thank you very much.