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en.allexperts.com/q/Excel-1059/macro-work.htm -
Posted by crouse
en.allexperts.com/q/Excel-1059/macro-work.htm
Posted by crouse
www.ozgrid.com/forum/showthread.php?t=30474
Posted by crouse
www.ozgrid.com/forum/showthread.php?t=30474
Posted by crouse
Macrocell array
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A macrocell array is an approach to the design and manufacture of ASICs. Essentially, it is a small step up from the otherwise similar gate array, but rather than being a prefabricated array of simple logic gates, the macrocell array is a prefabricated array of higher-level logic functions such as flip-flops, ALU functions, registers, and the like. These logic functions are simply placed at regular predefined positions and manufactured on a wafer, usually called master slice. Creation of a circuit with a specified function is accomplished by adding metal interconnects to the chips on the master slice late in the manufacturing process, allowing the function of the chip to be customised as desired.
Macrocell array master slices are usually prefabricated and stockpiled in large quantities regardless of customer orders. The fabrication according to the individual customer specifications may be finished in a shorter time compared with standard cell or full custom design. The macrocell array approach reduces the mask costs since fewer custom masks need to be produced. In addition manufacturing test tooling lead time and costs are reduced since the same test fixtures may be used for all macrocell array products manufactured on the same die size.
Drawbacks are somewhat low density and performance than other approaches to ASIC design. However this style is often a viable approach for low production volumes.
Retrieved from "http://en.wikipedia.org/wiki/Macrocell_array"
Posted by waqasahmad
large, covering a wide area
range of several hundred kilometers (km) to ten km
mostly deployed in rural and sparsely populated areas
Posted by HamidAliKhan
Macro cells are base stations that supply coverage to areas that are greater than 1,000 meters. It coverage to areas where the base station radius is between 100 meters and 1,000 meters. It may take three to five micro cells to provide coverage that is equivalent to that of one macro cell.
Posted by srini_murali
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