Programmable logic array integrated circuits with enhanced carry

Details Programmable logic array integrated circuits with enhanced carry Programmable logic array integrated circuits with enhanced carry

1995-06-30

1998-06-02

Malzahn, David H.

Boots, shoes, and leggings

36471606, 36478601, 326 41, G06F 750

Patent

active

057610991

ABSTRACT:
A programmable logic device (10) has a number of programmable logic elements (LEs) (12) which are grouped together in a plurality of logic array blocks (LABs) (14). A global interconnect structure (20, 24) is provided for interconnecting a LAB with other LABs. Adjacent or nearby LABs are directly connectable to one another to provide a direct carry chain (70a, 70b) between LABs. The carry chain is enhanced by providing a selector (80) that allows a LAB's carry input to selectively be coupled to either the carry output of an adjacent or nearly LAB or to the global interconnect.

REFERENCES:
patent: 4706216 (1987-11-01), Carter
patent: 5233539 (1993-08-01), Agrawal et al.
patent: 5260610 (1993-11-01), Pedersen et al.
patent: 5260611 (1993-11-01), Cliff et al.
patent: 5274581 (1993-12-01), Cliff et al.
patent: 5295090 (1994-03-01), Hsieh et al.
patent: 5311080 (1994-05-01), Britton et al.
patent: 5349250 (1994-09-01), New
patent: 5359242 (1994-10-01), Veenstra
patent: 5436574 (1995-07-01), Veenstra
patent: 5457644 (1995-10-01), McCollum
patent: 5481206 (1996-01-01), New et al.
patent: 5483478 (1996-01-01), Chiang
patent: 5523963 (1996-06-01), Hsieh et al.
patent: 5546018 (1996-08-01), New et al.
Altera Data Sheet, "Introduction," pp. 3-16, Aug. 1993, ver. 1.
Altera Data Sheet, "FLEX 8000 Programmable Logic Device Family," pp. 29-46, Aug. 1993, ver. 3.
Bernie New, Xilinx Application Note XAPP 013.001, "Using the Dedicated Carry Logic in XC4000," pp. 8-105-8-118.
AT&T Microelectronics, Advanced Data Sheet, "Optimized Reconfigurable Cell Array (ORCA) Series Field-Programmable Gate Arrays," pp. 1-36, 65-87.

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