The MMC interface allows for easy integration of the MultiMediaCards
in any application. The communication over the MMC bus
is based on command and data bit streams which are initiated
by a start bit and terminated by a stop bit. The applications
requiring higher data bandwidth have the flexibility to
select the bus width from 1 bit to 8 bits on the MMC card.
The MMC protocols minimize the number of pins. In fact,
the protocols require only 1 to 8 pins for data on top
of the pins for Command, Clock, power, and ground signals.