i'm still searching for the one who can help me.
anyway while reading the doc you sent me i've found something that could help me.
at page 55 in the note 2 it says:
For any of the following conditions, the pin/ball P1 must be connected to Vcc:
• All processors with a nominal core operating voltage less than 1.35V or greater than 1.60V
• All processors based on any new steppings following C-step
For all other processors based on A2/B0/C0 stepping, the pin/ball P1 can be connected to either Vcc or Vcct.
the piii 500, originally mounted, is based on stepping PA2, while the 800 and the 1000 processors are based on stepping PD0.
if the pin p1 is connected to vcct, maybe, i can't use higher speed on the 800 and 1000 processors.what do you think?