hard core


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hard core

Engineering material, such as broken bricks, stones, etc., used to form a foundation for a road, paving, building, etc.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

hard core

Lakatos’ term for that part of a scientific programme (see FALSIFICATIONISM) which is protected at all costs.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000

hard core

A block of digital logic that is designed to be implemented in an ASIC or FPGA chip. A chip design may be made up of one or more hard cores combined with one or more soft cores along with other blocks of user-defined logic.

For ASIC chips, a hard core is delivered as logic gates in which their physical locations relative to each other and their interconnections are predefined. This block will be treated as a "black box" by the place-and-route software that processes the entire design. The location of the block as a whole may be determined by the software, but the block's internal contents are "locked down."

With FPGAs, hard cores are already physically implemented as hardwired blocks embedded into the FPGA's fabric. See core, soft core, ASIC and FPGA.


How Hard Cores Fit In
When used in an ASIC chip, information about the hard core is entered at various stages to make room for it before its actual layers are added. With FPGAs, floor planning is still done, but the microprocessor core and other IP blocks are already in place. Consequently, instead of a gate-level netlist, a lookup table/configurable logic block (LUT/CLB) netlist is created, and the final output for FPGAs is a configuration file rather than GDSII files.
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References in periodicals archive ?
The decision of establishment of 3 more zones was taken to further harness the activities of the CTD and bring conformity in its action against the hard core out laws.
An education spokesman said: "We do now believe we are getting to the "hard core" truants and, while some of the children whom we have picked up may have had a valid reason for being off school, we are finding we are now seeing fewer and fewer children with their parents.
Though it had nothing to do with the "hard core" censorship of the book's title, the chapter showed that the Blacklist was used by conservative Christians to socially and professionally exile powerful Jews, while ensuring that progressive social messages would be kept out of films.
'Many were in the over-45 age bracket which suggest there is a hard core of motorists ignoring the message.'
If the clinic, Direction 180 closes, it's going to unleash 90 hard core addicts.
Processor architecture and cores provider MIPS Technologies Inc has teamed up with semiconductor foundry Taiwan Semiconductor Manufacturing Company Ltd to launch the MIPS64 5Kc hard core.
SNP councillors claim a hard core of problem tenants are driving people out from parts of Paisley and Johnstone.
Pol Pot and a hard core of guerrillas still hold out in a jungle enclave, but their influence on the future of the country looks more and more irrelevant.
The hard core is the higher-melting engineering resin, encapsulated by a soft shell of functionalized elastomer.
Although the images represent the highest resolution of the fragments to date, astronomers still can'[ clearly distinguish the hard core of each body from its comet-like shroud of dust and gas.
The negative heuristic is the program's hard core, or the fundamental statements which hold the edifice.
With that hard core, I am as pessimistic about what can be done through my approach as I am pessimistic about anyone else's.