A realization method of self-erasable fpga configuration module

Abstract

The invention relates to an implementation method of a self-erasable FPGA (field programmable gate array) configuration module, which comprises the steps of storing the configuration information of an FPGA in a PROM (programmable read-only memory); when the whole configuration module is power-on, loading the configuration information into the FPGA, so that the FPGA runs normally, and an external computer can implement the operations of accessing, programming and erasing the PROM by a JTAG (joint test action group). According to the invention, signals similar to JTAG erasing instructions are generated by using the FPGA, and the signals are transmitted to the PROM through the JTAG, thereby realizing a purpose of erasing the configuration information stored in the PROM; for ensuring the normal running of the whole configuration module, the control on a self-erasing operation is performed by using a CPLD (complex programmable logic device), thereby avoiding the occurrence of a mis-erasing situation. According to the invention, the self-erasing operation of the FPGA configuration module can be completed, the configuration information in the PROM can be completely erased, and the mis-erasing operation is avoided, thereby ensuring the normal running of a digital system.

Description

technical field [0001] The invention relates to a method for realizing a self-erasable FPGA configuration module, which belongs to the technical field of electronic products. Background technique [0002] Existing methods for erasing the FPGA configuration information stored on the PROM include a software erasing method and a physical destruction method. [0003] The software erasing method is to use the software provided by FPGA and PROM design manufacturers to erase. Taking Xilinx products as an example, the IMPACT software provided by this manufacturer can complete the erasing operation of configuration information, but this method must rely on the computer And the corresponding software to complete, the digital system cannot complete by itself, so there are certain limitations. [0004] The method of physical destruction usually adopts the method of electric burning, so that FPGA and PROM cannot work. However, it has been proved by experiments that electric burning onl...

AI Technical Summary

Problems solved by technology

[0003] The software erasing method is to use the software provided by FPGA and PROM design manufacturers to erase. Taking Xilinx products as an example, the IMPACT software provided by this manufacturer can complete the erasing operation of configuration information, but this method must rely on computer And the corresponding software to complete, the digital system cannot complete by itself, so there are certain limitations

[0004] The method of physical destruction usually adopts the method of electric burning, so that FPGA and PROM cannot work

However, it has been proved by experiments that electric burning only destroys the power supply module of the PROM, and will not affect its storage unit. The configuration information stored in it can still be read through certain technical means, and it cannot play a protective role.

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