By R. Dean Adams
According to the author's two decades of expertise in reminiscence layout, reminiscence reliability improvement and reminiscence try out. Written for the pro and the researcher to assist them comprehend the thoughts which are being proven.
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Additional info for High Performance Memory Testing Design Principles Fault Modeling
Optimizing the overall memory size can be accomplished by performing cell stepping, mirroring, and rotating of the cell layout. This stepping, mirroring, and rotating can also be done on a subarray basis and full appreciation of each is required to adequately test the memories. The cell of Figure 2-7 is repeated in Figure 2-24 but with the true portions of the cell highlighted. By removing the complement portions of the cell the stepping, mirroring, and rotating can be mom easily explained. Figure 2-25 shows the true portion of the cell from Figure 2-24 stepped horizontally and vertically so that four cells are now represented.
This realization will cause greater use and demand for increased complexity in multi-port memories. The key place that this complexity is Seen is in higher dimension multi-port memories. It is not unusual to see two, four, six, or nine port memories. Even higher dimension multi-port memories can be encountered, especially when considering pseudo multi-port memories, which will be discussed later. 1. CELL BASICS A multi-port memory cell has to have more than one access port. At a conceptual level Figure 3-1 illustrates the single port memory cell and the multi-port memory cell, where there is more than a single bit line contacting each cell along a column.
The apostle Paul in I Thessalonians 3:6 Multi-port memories have all the features of single-port memories, only more so. When you think of multi-tasking, the multi-port memory is a true example. Multiple simultaneous operations go on in parallel. Depending on the memory architecture, the operations can even be asynchronous. The design complexities and domain space for variations are huge. There are numerous applications where a multi-port memory is quite useful. The simplest case is a memory where a system engineer would like to write data each cycle and would also like to read data each cycle.