FPGA logic reloading circuit

Abstract

The invention discloses an FPGA logic reloading circuit, and the circuit comprises at least two Flash chips and a programmable logic circuit; at least two Flash chips are hung on the programmable logic circuit and are used as backups for each other, and a chip selection signal CS output by an FPGA is coupled between the Flash chips and the FPGA through the programmable logic circuit; the FPGA logic reloading circuit has three application modes: a logic loading mode, a logic online upgrading mode and a logic offline upgrading mode. According to the circuit, FPGA logic loading state judgment andreloading functions are achieved through control logic in the CPLD, and a logic upgrading function on specified Flash in an online state and an offline state can be achieved. According to the embodiment of the invention, the defect that the conventional FPGA logic storage and loading circuit cannot normally finish the loading operation when a Flash chip has a fault or upgrading loading is abnormally interrupted is avoided.

Description

Technical field: [0001] The invention relates to but not limited to the technical field of computer hardware, in particular to an FPGA logic reloading circuit in a circuit system. Background technique: [0002] In the design of modern avionics products, FPGA is widely used in the development and design of various embedded systems and modules. Since the avionics system has strict reliability requirements for the startup of electronic modules, traditional FPGA-based electronic modules usually use a piece of Flash to provide logic storage and loading functions for the FPGA chip. When the Flash chip fails and the pins of the Flash chip are desoldered / Bridging or abnormal power-off during the logic upgrade and loading process will cause the FPGA to fail to be loaded normally and the electronic module will be "bricked" and unable to work. Invention content: [0003] The purpose of the present invention is: the embodiment of the present invention provides a FPGA logic reloading...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: the embodiment of the present invention provides a FPGA logic reloading circuit to solve the traditional FPGA logic storage and loading circuit, which may cause the entire circuit to fail to complete the loading operation normally due to a Flash chip failure or an abnormal interruption of the upgrade loading question

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