1 Each term should be used in one and only one way throughout the dissertation.  The easiest way to avoid a long series of definitions is to include a statement: ``the terminology used throughout this document follows that given in [CITATION].'' Then, only define exceptions.
Serial Peripheral Interface Bus. The Serial Peripheral Interface bus (SPI) is a synchronous serial communication interface specification used for short distance communication, primarily in embedded systems. The interface was developed by Motorola in the late 1980s and has become a de facto standard. Typical applications include Secure Digital cards and liquid crystal displays.
5 Bus Interface. 5 BUS INTERFACE. The ETRAX 100LX bus interface has a 32/16-bit data bus, a 25-bit address bus, and. six internally decoded chip select outputs. Six additional chip select outputs are. multiplexed with other I/O functions, and are available in some configurations.