biderectional buffers inappropriate
(reported by Piotr Miedzik)
txb0108: This bidirectional buffers with direction autosensing are inappropriate for this kind of application. Lack of direction control will not work properly in pci environment.
Txb010x changes direction by detecting rising/falling edge. It's independent for each channel. It might happen that one pin will change direction without any particular reason (gravity waves?)