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The D- and M-PHY are expected to co-exist for multiple years because the D-PHY is a less complex technology while the M-PHY provides higher bandwidths despite using fewer signal wires.
===Low speed modes and power savings===
It is worth noting that UniPro supports the power efficient low speed communication modes provided by both the D-PHY (10 Mbps) and M-PHY (3->100 Mbps). In these modes, power consumption roughly scales with the amount of data that is sent. In contrast, in high-speed modes the energy dissipation by the PHY circuitry is roughly constant because the clocking and bit stream keep running even between packets).
Furthermore both PHY technologies provide additional modes related to power saving because of their intended suitability for small battery-powered devices.
==PHY Adapter Layer (L1.5)==
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