SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
Table 15-18 lists the ratio of effective data-to-transferred data at the external memory interface for the buffered raster-based initiators in each mode and orientation when using a 32-bit DDR3 memory.
0- or 180-Degree Orientation (S = 0) | 90- or 270-Degree Orientation (S = 1) | |||
---|---|---|---|---|
Progressive | Interlaced | Progressive | Interlaced | |
8-bit mode | 100% | 50% | 100% | 50% |
16-bit mode | 100% | 50% | 100% | 50% |
32-bit mode | 100% | 50% | 100% | 50% |
Page mode | 100% | N/A | 100% | 100% |
When using 32-bit DDR3 SDRAM, whenever all previous guidelines are fulfilled, there is no penalty for these initiators to access a tiled object in any orientation, except for accesses to an interlaced frame in any orientation where the memory bandwidth is twice the requested bandwidth.
When using DDR3 SDRAM, all accesses, except interlaced accesses, are equally efficient and offer the full possible memory bandwidth.
Similarly, page mode does not introduce any performance hit.