M-Bus {is a protocol [EN1434-3] for remote reading of Heating or Electrical energy counters. The physical layer supports the data transmission as well as the power supply over a two wire cable. The data exchange follows a Master-Slave structure where the PCD is master while all counters are slaves. The M-Bus documents; m-bus.com }

MC-10 {Obsolete serial interface based on RS232, used on the TRS-80}

MCA {Micro Channel Architecture bus: Designed to correct the problems with the ISA bus, but never caught on out side of IBM machines. The bus is Obsolete, replaced by the PCI bus.}

MCBSP {TI DSP serial Bus; Multichannel Buffered Serial Port}

MDA [Monochrome Display Adapter]: {The original IBM PC. MDA is a monochrome-only, text-only standard, allowing text display at 80x25 characters. OBSOLETE.}

MDIO {Management Data Input/Output}

Mezzanine Bus(s) {Daughter Board form factors; PC MIP - PMC - IP}

MIB {Medical Information Bus; IEEE-1157}

MI Bus {Motorola Interconnect}

MicroSD{A type of removable Flash drive. Secure Digital}

MicroTCA{A backplane architecture designed to support AdvancedMC, AMC modules}

MicroUSB {A backplane architecture designed to support AdvancedMC, AMC modules}

MICROWIRE Bus {MICROWIRE is a [full-duplex] serial interface standard defined by National Semiconductor. The MICROWIRE protocol is a subset of the SPI interface.}

MII {Media Independent Interface, Ethernet}

MIL-STD-1553 Bus {MIL1553B is a dual redundant differential bus defined by Military Standard 1553 [MIL-STD-1553]. Operates at 1.0 megahertz (MHz).}

MIL-STD-1397: {NTDS; MIL-STD-1397, Input / Output Interfaces, Standard Digital Data.}

Mini PCI {Is a small form factor version of a PCI card for Laptops/NoteBook computers. Mini PCI uses a subset of the PCI specification with a 32-bit bus running at 33MHz.}

miniSD{A type of removable Flash drive. Secure Digital}

MLVDS {Multipoint Low Voltage Differential Signaling, TIA/EIA-899}

M-Module {Yet another Mezzanine card format, out-dated}

Modem Interface Bus {A listing of International Telegraphic Union Modem standards}

MOST bus: {Media Oriented Systems Transport, a multimedia fiber-optic point-to-point network implemented in a ring, star or daisy-chain topology over Plastic optical fibers [POF] for Automotive applications.}

Mouse Port {The serial mouse used on Personal Computers [PCs] is a 6 pin Circular DIN.}

MPI Bus {The serial MicroProcessor Interface [MPI] bus consists of a bidirectional [three-state] data line [DIO], and a Clock line [DCLK]. The clock frequency is 4.096MHz. MPI bus is a synchronous Master/Slave serial bus. Using 8 bit words, MSB is transmitted first}

MTM Bus {Serial five wire Test and Maintenance Bus used to 'Boundary-Scan' cards; at the board level. The MTM bus tests at the board level, while JTAG tests at the chip level.}

Multibus I/II {IEEE-1296 had a 32 bit bus which ran at 80MBps, the card sizes are 3U x 220mm, and 6U x 220mm. This bus is OBSOLETE.}

Multimedia Card {MMC, a flash memory card format. Shape 32mm x 24mm x 1.4mm}

MuTIOL (Silicon Integrated Systems Corp. [SIS] uses MuTIOL as a Proprietary Interconnect between it's North and South bridge chips. MuTIOL [Multi-threaded I/O Link] is a 16-bit 266MHz [533MB/s Bandwidth] bi-directional data bus.)

MVB {Multifunction Vehicle Bus. A european bus standard}

Next Section Electronic Buses 'N', or Interface Bus protocols.
An alphabetic list of interface buses, describing the physical and electrical interfaces.