Search results
Results From The WOW.Com Content Network
"Don't care" may also refer to an unknown value in a multi-valued logic system, in which case it may also be called an X value or don't know. [19] In the Verilog hardware description language such values are denoted by the letter "X". In the VHDL hardware description language such values are denoted (in the standard logic package) by the letter ...
A "don't care" condition is a combination of inputs for which the designer doesn't care what the output is. Therefore, "don't care" conditions can either be included in or excluded from any rectangular group, whichever makes it larger. They are usually indicated on the map with a dash or X. The example on the right is the same as the example ...
The four values are 1, 0, Z and X. 1 and 0 stand for Boolean true and false, Z stands for high impedance or open circuit and X stands for don't care (e.g., the value has no effect). This logic is itself a subset of the 9-valued logic standard called IEEE 1164 and implemented in Very High Speed Integrated Circuit Hardware Description Language ...
A truth table of a single bit 4-to-2 priority encoder is shown, where the inputs are shown in decreasing order of priority left-to-right, and "x" indicates a don't care term - i.e. any input value there yields the same output since it is superseded by a higher-priority input.
Verilog was later submitted to IEEE and became IEEE Standard 1364-1995, commonly referred to as Verilog-95. In the same time frame Cadence initiated the creation of Verilog-A to put standards support behind its analog simulator Spectre. Verilog-A was never intended to be a standalone language and is a subset of Verilog-AMS which encompassed ...
30 years before Sean ‘Diddy’ Combs was charged with sex trafficking, he organized a charity event where 9 people were crushed to death.Combs’s long-forgotten past includes three arrests ...
don't care The IEEE 1164 standard ( Multivalue Logic System for VHDL Model Interoperability ) is a technical standard published by the IEEE in 1993. It describes the definitions of logic values to be used in electronic design automation , for the VHDL hardware description language. [ 2 ]
System Verilog is the first major HDL to offer object orientation and garbage collection. Using the proper subset of hardware description language, a program called a synthesizer, or logic synthesis tool , can infer hardware logic operations from the language statements and produce an equivalent netlist of generic hardware primitives [ jargon ...