Methods and circuits for deadlock avoidance

Abstract

A system is disclosed that includes a first communication circuit (110) that communicates data (302,304) over a first data port (112) using a first communication protocol. The system also includes a second communication circuit (130, 340) that communicates data over a second data port (132) using a second communication protocol. The second communication protocol processes read and write requests in an order that the read and write requests are received. A bridge circuit (120,310) is configured to communicate data between the first data port (112) of the first communication circuit and the second data port (132) of the second communication circuit. The bridge circuit (120,310) is configured to communicate non-posted writes to the second communication circuit via a buffer circuit (122,328) and communicate posted writes to the second communication circuit via a communication path (322) that bypasses the buffer circuit.

Description

technical field [0001] The present disclosure relates generally to integrated circuits (ICs) and, more particularly, to data communications. Background technique [0002] Programmable integrated circuits (ICs) are devices that can be programmed to perform specific logic functions. One type of programmable IC - a field programmable gate array (FPGA) - usually includes an array of programmable chips. Each programmable slice may include programmable interconnect and programmable logic. Programmable interconnects typically include a large number of interconnect lines of various lengths interconnected by programmable interconnect points (PIPs). Programmable logic implements user-designed logic through the use of programmable elements that may include, for example, function generators, registers, arithmetic logic, and the like. Programmable interconnect and programmable logic are typically programmed by loading configuration data streams into internal configuration memory cells...

AI Technical Summary

Problems solved by technology

However, implementing an appropriate arrangement for communication between the different parts presents a challenge to the designer

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