Unfortunately no.

In fact I am interested to know how to find it out and adjust it. And when connecting directly to a MCU what can be adjusted ? For instance I read the P89c51rx2 data sheet which has this to say on the XTAL1 pin : VIH = 0.7Vcc to Vcc+0.5.

I think all that can be done is to measure amplitude of the signals at XTAL1 pin and if they satisfy the above conditions- just leave it alone ? Or there is more to it ?

Thanks

Raghu