Non-handshake-type JTAG debugging link compatible to AHB protocol and debugging method thereof

Abstract

The invention discloses a non-handshake-type JTAG debugging link compatible to an AHB protocol and a debugging method thereof. The link comprises a deserializing unit which is provided with an external JTAG standard interface on one side and an AHB standard host interface on the other side, and the deserializing unit utilizes a user-defined TAP controller instruction of an IEEE 1149.1 protocol toachieve seamless connection with the AHB protocol through an extension instruction; on the basis of mutual parsing of information, a high-speed serial debugging command sent by an upper computer is mapped onto communication channels of the interior of a chip, an access command is sent to the whole system of the chip to simulate the behaviors of a host, and then the key status information about system running is converted into serial data again and sent back to the upper computer. Compared with traditional debugging approaches, the method has the advantages of being higher in speed and better in stability, since the JTAG interface of standard DFT is repeatedly used, pin resources of the chip are saved, and by establishing a conversion channel between the standard JTAG interface and an on-chip AMBA bus, the method has high practical value and universality.

Description

technical field [0001] The invention belongs to the technical field of integrated circuit design and testing, and in particular relates to a non-handshaking JTAG debugging link compatible with the AHB protocol and a debugging method thereof. Background technique [0002] With the rapid development of microelectronics technology, the integration level of monolithic transistors has increased rapidly. Among them, the SoC design methodology driven by IP multiplexing makes the functional components of a single chip increasingly rich and complex. However, with the integration of many high-speed and complex storage control, communication protocol node control, and digital-analog mixed IP, the problem of full-chip function debugging has become an increasingly serious problem in high-density chip integration design. How to quickly and efficiently trace the fault phenomenon and provide a basis for analyzing the cause of the fault has become an important design task of the debuggable d...

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Problems solved by technology

However, the patent does not involve specific design details, and the debugging interface is only used in the chip debugging stage, and does not need to be activated in the working state, so this structure will consume too much chip resources

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