A method, apparatus, and computer program product are provided for implementing an enhanced DRAM interface checking. An interface check mode enables interface checking using a refresh command for a DRAM. A predefined address pattern is provided for the interface address inputs during a refresh command cycle. Interface address inputs are checked for a proper value being applied and an error is signaled for unexpected results. An extended test mode includes further testing during a cycle after the refresh command cycle. Then command inputs also are checked for a proper value being applied and an error is signaled for unexpected results.