High Speed, Minimal Area, and Low Power SEC Code for DRAMs with Large I/O Data Widths

Many ECCs have been proposed to enhance the reliability of DRAMs, but most of them lack in the aspects of practical feasibility. We prioritize on how well and efficiently code could be actually implemented and propose high speed, minimal area, and low power SEC code for DRAMs with large I/O data widths. The proposed code minimizes the column weight, row weight and total weight of the H-matrix. Consequently, the area overhead and power consumption of the check bit generator are reduced by 17.7% at the most. The propagation delay is also decreased by reducing the level of XOR trees. Moreover, maximal power reduction is possible as the optimal H-matrix variants can be formulated to specifically tailor for various system applications with different spatial and temporal data correlations.