In computing, a logic block or configurable logic block (CLB) is a fundamental building block of field-programmable gate array (FPGA) technology.[citation needed] Logic blocks can be configured by the engineer to provide reconfigurable logic gates.[citation needed]
Logic blocks are the most common FPGA architecture, and are usually laid out within a logic block array.[citation needed] Logic blocks require I/O pads (to interface with external signals), and routing channels (to interconnect logic blocks).
Programmable logic blocks were invented by David W. Page and LuVerne R. Peterson, and defined within their 1985 patents.[1][2]
^Google Patent Search, "Re-programmable PLA". Filed January 11, 1983. Granted April 2, 1985. Retrieved February 5, 2009.
^Google Patent Search, "Dynamic data re-programmable PLA". Filed January 11, 1983. Granted June 18, 1985. Retrieved February 5, 2009.
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