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486 pll

Does anyone know if the internall PLL on an Intel 80486 can be by-passed or disabled?

I want to single step using an externally controlled clock without the PLL.

Thanks, Wayne

Reply to
bigwayne
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Doubtful unless it's a fully-static core.

Reply to
Jim Stewart

You can't. The PLL feeds the internal clock. It can't be bypassed.

If you want to single step you *must* use the TAP (Test Access Port) which is JTAG derived.

There is no other way to do this.

Reply to
Correlious

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