Low-power data cache architecture by address range reconfiguration for multimedia applications

Today's portable electric consumer devices tend to include more multimedia processing capabilities. This trend results increased processing resources, thus causing more power consumption. Therefore, the power-efficiency becomes important due to battery operated nature of portable devices. In this paper, we propose a reconfigurable data cache architecture, in which data allocation to a cache is constrained by address range configuration. Then we evaluate trade-off between performance and power efficiency. Comparing to the conventional cache architectures, power consumption can be reduced decently while maintaining miss rate of the proposed data cache similar to those of the conventional caches. The result shows that the reconfigurable data cache operates with 33.2%, 53.3%, and 70.4% less power when compared with direct-mapped, 2-way, and 4-way set-associative caches respectively.