Integrated Device Technology, Inc.

Agate Logic, Inc.

Cswitch Corporation

Conrad Kong

Ravi S Sunkavalli

Hare Krishna Verma

Sudip K Nag

Bo Hu

Chandra Mulpuri

Ashok Vittal

Manoj Gunwani

Nilanjan Chatterjee

Hare K Verma

Jai Liu

A programmable logic array for use in a field programmable application specific integrated circuit (ASIC) implementation is provided. The programmable logic array includes programmable logic blocks, and programmable logic interfaces. The programmable logic interfaces couple the programmable logic blocks to external interfaces of the field programmable ASIC, and enable the programmable logic array to be inserted into the field programmable ASIC as a hard macro block.

Field programmable application specific integrated circuit with programmable logic array and method of designing and programming the programmable logic array

A programmable logic structure is disclosed employing input logic routing cell (ILRC) multiplexers and output logic routing cell (OLRC) multiplexers for making local connections between dedicated logic cells. In a simple programmable logic structure, a dedicated logic cell (DLC) is implemented in a programmable logic structure comprising multiple ILRC multiplexers for port A and multiple OLRC multiplexers for port B. In a multi-level programmable logic structure, multiple columns of dedicated logic cells is designed with columns of dedicated local cells adjacent to each other where each DLC column is used to implement a particular logic function. In a first embodiment, local connections can be made between dedicated logic cells, e.g. an OLRC in a first DLC at level L making local point-to-point connections to an ILRC in a second DLC at level L+1. In a second embodiment, local connections can be made from any other dedicated logic cells, whether positioned horizontally or vertically relative to a relative point or multiplexer, and from any offset from a current logic and routing cell (LRC). In a third embodiment, local connections can be made by stitching a first OLRC to a second OLRC (for connecting to an ILRC), which allows lines from other columns or levels of DLC to reach an ILRC for a fast local interconnect.

Programmable logic cells with local connections

Growing community of inventors

San Jose, CA, United States of America

Conrad Kong