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What is the difference between PCI pad and CMOS pad?

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wicho

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What is the difference between PCI pad and CMOS pad?

I can't find the difference in library databook...

Please let me know the difference..
 

Re: PCI pad Vs. CMOS pad

I think one of the main differences is that PCI input pads will always having clamping diodes. All of the PCI signals (other than the PCI clk) rely on reflected vs incident wave switching. The PCI loads are expected to be unterminated so as to present a high impedance and fully reflect an incoming signal. The clamping diode limits the amount of overshoot.

Radix
 

Re: PCI pad Vs. CMOS pad

PCI PAD has specific driving characteristic.

bet reagrds



wicho said:
What is the difference between PCI pad and CMOS pad?

I can't find the difference in library databook...

Please let me know the difference..
 

Re: PCI pad Vs. CMOS pad

radix may be right. you can find those in PCI standrant. if you want learn the detail your can reference the pad's circuit schematic which is often come with the PAD lib. in my mind TSMC and SMC contain it.
 

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