Bits are sent out onto the bus least-significant bit (LSb) first, followed by the next LSb, through to the mostsignificant bit (MSb) last. In the following diagrams, packets are displayed such that both individual bits and fields are represented (in a left to right reading order) as they would move across the bus.

Multiple byte fields in standard descriptors, requests, and responses are interpreted as and moved over the bus in little-endian order, i.e., LSB to MSB.