LSF0204: PCIe Wake# and CLKREQ# ISSUES

Perry Chuang

Prodigy 130 points

Part Number: LSF0204

Hi,

I’d like to know which item Bidirectional bus buffer gate can design in pcie 3.3V Wake# and CLKREQ# signals.

The LSF0204 can use in 1.8V to 3.3V only, we need 3.3V to 3.3V to extend Wake# and CLKREQ#.

In PCIE SPEC, Wake# and CLKREQ# are defined for Bidirectional

Best Regards

perry

over 5 years ago

0 Clemens Ladisch over 5 years ago

Guru 316380 points

The LSF is a passive switch; it cannot buffer the signals.

And it is not possible to have a bidirectional buffer without a direction control signal, because when the voltages at the two sides are different, the buffer cannot know which one should override the other.

Logic

Logic forum

LSF0204: PCIe Wake# and CLKREQ# ISSUES