Specifications

MII
- Media Independent Interface
The IEEE Ethernet standard control interface used to communicate between the Ethernet controller (MAC)
and the external PHY.
MMU
- Memory Management Unit
CPU component which maps kernel- and user-space virtual addresses to physical addresses, and is an integral
part of Linux kernel operation.
MTD
- Memory Technology Devices
The MTD functions in Linux support memory devices like flash or Disk-On-Chip in a device-independend
way so that the higher software layers (like filesystem code) need no knowledge about the actual hardware
properties.
PC
Card
PC Cards are self-contained extension cards especially for laptops and other types of portable computers. In
just about the size of a credit card they provide functions like LAN cards (including wireless LAN), modems,
ISDN cards, or hard disk drives - often "solid-state" disks based on flash chips.
The PC Card technology has been has been developed and standardized by the Personal Computer Memory
Card International Association (PCMCIA), see http://www.pcmcia.org/pccard.htm .
PCMCIA
- Personal Computer Memory Card International Association
PCMCIA is an abbreviation that can stand for several things: the association which defines the standard, the
specification itself, or the devices. The official term for the devices is PC-Card.
PHY
- Physical Interface
The physical layer transceiver which implements the IEEE Ethernet standard interface between the ethernet
wires (twisted pair, 50 ohm coax, etc.) and the ethernet controller (MAC). PHYs are often external
transceivers but may be integrated in the MAC chip or in the CPU.
The PHY is controlled more or less transparently to software via the MII.
MII 208