Free On-line Dictionary of Computing:
data address generator
(DAG) The mechanism which generates temporary
memory addresses for data that is transferred between memory
and registers in a Digital Signal Processor.
architectures incorporate more than one DAG to
simplify the programming needed to move blocks of data between
For instance, certain
Fast Fourier Transform
requiring bit reversing, can use the DAG for that purpose,
or they can use two DAGS, one for Program Memory Data (PMD),
and the other for Data Memory Data (DMD).