Search results
Results From The WOW.Com Content Network
Verilog-2001 is a significant upgrade from Verilog-95. First, it adds explicit support for (2's complement) signed nets and variables. Previously, code authors had to perform signed operations using awkward bit-level manipulations (for example, the carry-out bit of a simple 8-bit addition required an explicit description of the Boolean algebra ...
A dynamic array works much like an unpacked array, but offers the advantage of being dynamically allocated at runtime (as shown above.) Whereas a packed array's size must be known at compile time (from a constant or expression of constants), the dynamic array size can be initialized from another runtime variable, allowing the array to be sized ...
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 ...
Verilog-A was an all-analog subset of Verilog-AMS that was the project's first phase. There was considerable delay between the first Verilog-A language reference manual and the full Verilog-AMS , and in that time Verilog moved to the IEEE, leaving Verilog-AMS behind at Accellera .
Register-transfer-level abstraction is used in hardware description languages (HDLs) like Verilog and VHDL to create high-level representations of a circuit, from which lower-level representations and ultimately actual wiring can be derived. Design at the RTL level is typical practice in modern digital design.
PLA schematic example. A programmable logic array (PLA) is a kind of programmable logic device used to implement combinational logic circuits.The PLA has a set of programmable AND gate planes, which link to a set of programmable OR gate planes, which can then be conditionally complemented to produce an output.
for each byte in data do nLookupIndex ← (crc32 xor byte) and 0xFF crc32 ← (crc32 shr 8) xor CRCTable[nLookupIndex] // CRCTable is an array of 256 32-bit constants // Finalize the CRC-32 value by inverting all the bits crc32 ← crc32 xor 0xFFFFFFFF return crc32
Value change dump (VCD) (also known less commonly as "variable change dump") is an ASCII-based format for dumpfiles generated by EDA logic simulation tools. The standard, four-value VCD format was defined along with the Verilog hardware description language by the IEEE Standard 1364-1995 in 1996.