Generic libraries

The security objectives elaboration is also aided by the implemented generics library. The objectives provide a concise statement of the intended response to the security problem [1], indicating the extent to which the security needs, defined by the security environment, are addressed by the... 

Figure 3-1 Generic (a) and mixture (b) combinatorial libraries. The size of the generic library is the product of the various numbers of substituents (here, 2x2x4 X 5. or 80). The size of the mixture library IS simply the total number of structures.

Ubrary A collection of structures, cither a generic library (baiicd on some icalTold plus multiple residues) or a mixture library (containing diverse. scaffolds). The number of. specific structures in a library is either the product of the numbers of residues pos.sible at each variable position (for a generic library) or. simply the sum of the number of structures (for a mixture library). 

Member Either lal a particular substituent at a given position in a generic structure (an R-group member) or Ih) an enumerated structure of a generic library, which corFe.spunds to a given selection of substituents (a member of a library). 

If a clear distinction between equipment-specific and generic procedures is made then the writing of procedures proceeds in two steps. First, the generic library of SOPs is created. Then the unit-specific and equipment-specific procedures can be written. 

The technology and symbol libraries must exactly match in case for the cell names and their pin names. In other words, if the pin names of the IVA cell in the technology library do not match the pin names of the cell IVA in the symbol library, the tool will not be able to use the IVA symbol. In such a scenario, the tool uses symbols from the synopsys default generic library. The comparejib command in DC, is a fast check mechanism to determine any differences between the symbol library and the technology library that might exist. 

The translate command replaces each cell in the design with the closest matching functional cell from the targetjibrary. In case such a matching cell is not found then it is converted to a cell from the generic library. The dont use, dontjouch, set default register type and the prefer command are useful commands that affect the translation process. 

This error message occurs when writing out EDIF schematics if some of the cells used in the design are from the generic.sdb symbol library. DC automatically substitutes cells from this library if they are not available in the vendor s symbol library. The scales used in the generic symbol library and the vendor library are almost always different. One must determine which cells from the generic library are being used and ensure that symbols for those cells are available in the vendor symbol library. 

The target technology library supplied by a vendor can be specified or the design can be compiled into a generic library, as is the case here. 

A variety of statistics are generated by the synthesis tools for each circuit. When generic libraries are being used these data bear little similarity to the characteristics expected from a technology mapped design. However, they provide a dear basis for the comparison of the area and speed characteristics of the different circuits. The following statistics are presented for each drcuit ... 

This example again demonstrates the types of circuit produced by s)mthe-sis when using generic libraries. This circuit is optimized in its generic form. Some of the typical synthesis options for the component (top level) may be the following. 

Synthesis Synthesis Optimization Ubrary generic Library generic Type speed Components Components Max. delay 5 ns... 

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