Patent Number: 6,310,813

Title: Methods and apparatus for bypassing refreshing of selected portions of DRAM devices

Abstract: Refreshing of a portion of a DRAM device is bypassed when carrying out a refreshing operation on the DRAM device. By bypassing the refreshing of a portion of the DRAM device when carrying out a refreshing operation, the operational speed of the DRAM device and of systems that use the DRAM device can be increased, and/or the power consumption thereof can be decreased. More specifically, graphic memory apparatus include a DRAM device that is divided into a frame buffer zone that supplies pixel data for a display and at least one other zone, such as a z buffer and/or a texture storing zone. Refreshing of the frame buffer zone is bypassed when carrying out a refreshing operation on the DRAM device. In a preferred embodiment, indications of a starting DRAM address and an ending DRAM address for the frame buffer may be stored. A refreshing operation is performed only on those DRAM addresses that fall outside the starting address and the ending address.

Inventors: Bae; Won-Il (Seoul, KR)

Assignee: Samsung Electronics Co., Ltd.

International Classification: G11C 11/406 (20060101); G11C 007/00 ()

Expiration Date: 10/30/2018