Protection method of IP (internet protocol) core with determined validity

Abstract

The invention discloses a protection method of an IP (internet protocol) core with determined validity. The method is realized through implanting counters into redundant state of a plurality of state machines of the IP core, and using low-overturn probability node in the IP core circuit as trigger condition of the redundant state. A plurality of counters are arranged in a classification manner, the next class of counter is subjected to carrying when the front class of counter is full, and a control signal is transmitted to the IP core circuit when the last class of counter is full to make the IP core become unusable. In an actual use process, through changing the bits of the counters in the implanted state machines and reasonably selecting the number of the state machines, the IP core circuit is enabled to fail in a predetermined time range to limit the user of the IP core, so as to protect the IP core effectively. The service life of the IP core circuit is prolonged effectively by the structure in the primary IP core circuit on the basis of saving the IP core circuit area, so good elusive performance and high flexibility are realized.

Description

technical field [0001] The invention designs a method for protecting an IP core, and in particular relates to a method for protecting an IP core with a limited validity period. Background technique [0002] As the scale of integrated circuits becomes larger and the integration level of chips becomes higher and higher, the application of SOC (system-on-chip) becomes more and more extensive. But for large circuits, no matter in terms of design cost, design cycle or reliability, the traditional method can no longer meet the demand. The emergence of IP core multiplexing technology has effectively solved these problems, and the designed IP modules can be used directly. The emergence of IP cores has greatly improved the efficiency of large-scale IC design and greatly promoted the development of the integrated circuit design industry, which has made IP cores develop rapidly and become the fastest growing part of the integrated circuit industry. However, with the promotion and use...

AI Technical Summary

Problems solved by technology

This method cannot test the power consumption and other information integrated in the chip and the compatibility with other modules in the chip. The use of the IP core is limited and has certain limitations.

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