"terry" <leonlai2k@yahoo.com> wrote in message
news:9904d48.0408140703.1ea1633e@posting.google.com...
> Hi,
>
> I am going to interface a chip usbn9603 to the microcontroller.
> However, I find the 24MHz crystal cannot oscillate (with capacitors
> 15pF and shunt resistor 1M Ohm). Why? I have checked the circuit for
> the whole day but cannot find the solution. Could anyone give me some
> hints why the oscillator cannot work.

Have you tried another crystal?

Leon

Hi,

I am going to interface a chip usbn9603 to the microcontroller.
However, I find the 24MHz crystal cannot oscillate (with capacitors
15pF and shunt resistor 1M Ohm). Why? I have checked the circuit for
the whole day but cannot find the solution. Could anyone give me some
hints why the oscillator cannot work.

Thanks!