For a current processor, it has been reported that more than 50% of power has been consumed by an on-chip cache memory. To reduce power consumption for the cache memory, it is required to develop an effective replacement policy and mapping function, which would decide the cache memory accesses. In this paper, we introduce an ELRU-SEQ replacement policy with skewed mapping function to save energies for data caches. In addition, we develop an integrated power model by using Spectre and Cacti simulator to produce the experimental results. Our experimental results show that ELRU-SEQ with skewed mapping function works well in reducing power consumption compared to other conventional data caches.