M-PHY
M-PHY is a high speed data communications physical layer protocol standard developed by the MIPI Alliance, PHY Working group, and targeted at the needs of mobile multimedia devices. The specification's details are proprietary to MIPI member organizations, but a substantial body of knowledge can be assembled from open sources. A number of industry standard settings bodies have incorporated M-PHY into their specifications including Mobile PCI Express, Universal Flash Storage, and as the physical layer for SuperSpeed InterChip USB.
| MIPI M-PHY | |
| Year created | 2011 |
|---|---|
| Created by | MIPI Alliance |
| Supersedes | D-PHY |
| Width in bits | 1–4 lanes, w/adaptive discovery (depending on higher-level protocol) |
| Speed | up to 11.6 Gbit/s per data lane |
| Style | serial, embedded clock |
| External interface | yes, with optical media converter |
| Website | https://mipi.org/specifications/m-phy |
To support high speed, M-PHY is generally transmitted using differential signaling over impedance controlled traces between components. When use on a single circuit card, the use of electrical termination may be optional. Options to extend its range could include operation over a short flexible flat cable, and M-PHY was designed to support optical media converters allowing extended distance between transmitters and receivers, and reducing concerns with electromagnetic interference.