Computer Dictionary of Information Technology

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.

Certain DSP architectures incorporate more than one DAG to simplify the programming needed to move blocks of data between buffers.

For instance, certain Fast Fourier Transform algorithms 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).