Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual page 1146

External Bus Controller (EBC).
A component that provides arbitration between the External Access Bus
(EAB) and the DMA External Bus (DEB), granting at most one requester
per cycle.
External Bus Interface Unit (EBIU).
A component that provides glueless interfaces to external memories. It ser-
vices requests for external memory from the core or from a DMA channel.
external port.
A channel or port that extends the processor's internal address and data
buses off-chip, providing the processor's interface to off-chip memory and
peripherals.
External Port Bus (EPB).
A bus that connects the output of the EBIU to external devices.
FFT (Fast Fourier Transform).
An algorithm for computing the Fourier transform of a set of discrete data
values. The FFT expresses a finite set of data points, for example a peri-
odic sampling of a real-world signal, in terms of its component
frequencies. Or conversely, the FFT reconstructs a signal from the fre-
quency data. The FFT can also be used to multiply two polynomials.
FIFO (First In, First Out).
A hardware buffer or data structure from which items are taken out in the
same order they were put in.
flash memory.
A type of single transistor cell, erasable memory in which erasing can only
be done in blocks or for the entire chip.
G-10 ADSP-BF537 Blackfin Processor Hardware Reference