Programmable input/output block (IOB) in FPGA integrated circuit

Details Programmable input/output block (IOB) in FPGA integrated circuit Programmable input/output block (IOB) in FPGA integrated circuit

1997-12-22

2000-03-07

Tokar, Michael

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 41, 326 47, H03K 19177, G06F 738

Patent

active

060345446

ABSTRACT:
A Field Programmable Gate Array (FPGA) device includes a plurality of input/output blocks (IOBs) and variable grain blocks (VGBs) An inter-connect network provides routing of signals between the IOBs and VGBs. The VGBs include a plurality of L-organized CBBs (configurable logic blocks) having function-producing resources. The IOBs are arranged along a top, left, bottom and right side of the plurality of VGBs. An IOB includes a 1) delay for timing input signals, 2) a configurable output latch which may be set or reset responsive to control signals, and 3) transistor for controlling a NOR line. The IOB is programmably configured to the inter-connect network which includes vertical and horizontal inter-connect channels comprising adjacent inter-connect lines.

REFERENCES:
patent: 5210448 (1993-05-01), Takata
patent: 5260881 (1993-11-01), Agrawal et al.
patent: 5365125 (1994-11-01), Goetting et al.
patent: 5581199 (1996-12-01), Pierce et al.
patent: 5594367 (1997-01-01), Trimberger et al.

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