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JTAG control device and method for realizing JTAG control

A control device and control unit technology, applied in the direction of measuring device, computer control, general control system, etc., can solve the problems of controlling JTAGTAP, etc., achieve good scalability, and realize the effect of JTAG testing

Pending Publication Date: 2021-03-30
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the chip scale is getting bigger and bigger, and the functional requirements are also increasing. In order to simplify the design complexity, modularization and intellectual property (IP, Intellectual Property) will be adopted for design, and sub-modules and IP are undergoing DFT testing. During design, a JTAG TAP controller may be integrated. There will be multiple JTAG TAP controllers in such a chip. Whether it is the traditional 1149.1 protocol or the later evolved IEEE1500 and IEEE1687 JTAG protocols, they cannot pass the top-level JTAG TAP controller. Existing JTAG TAP in the system

Method used

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  • JTAG control device and method for realizing JTAG control
  • JTAG control device and method for realizing JTAG control
  • JTAG control device and method for realizing JTAG control

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Embodiment Construction

[0040] In a typical configuration of the present application, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0041] Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and / or nonvolatile memory such as read only memory (ROM) or flash RAM. Memory is an example of computer readable media.

[0042] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-On...

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PUM

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Abstract

The invention discloses a JTAG control device and a method for realizing JTAG control, and the JTAG control device simply realizes that a plurality of sub JTAG TAP test control circuits are connectedto a main TAP control circuit, and effectively realizes JTAG test. The JTAG control device of the master-slave structure has good expansibility, and theoretically, infinite slave TAP control units canbe mounted.

Description

technical field [0001] The present application relates to but not limited to electronic control technology, especially a JTAG control device and a method for realizing JTAG control. Background technique [0002] Joint Test Action Group (JTAG, Joint Test Action Group) provides a standard test access port, including: test data input (TDI) port, test data output (TDO) port, test mode selection (TMS) port, test clock ( TCK) port, test reset (TRST) port. JTAG can realize boundary scan test and state control and observation of the internal circuit of the chip. JTAG is the most commonly used test control technology in Design For Test (DFT, Design For Test). The JTAG protocol gradually optimized and evolved from the original 1149.1 to the later IEEE1500 and IEEE1687 (IJTAG, InternalJTAG); among them, the IEEE1500 protocol defines the standard Wrapper TAP interface and communication mechanism between the test access port (TAP, Test Access Port) and the module; The IEEE1687 protoco...

Claims

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Application Information

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IPC IPC(8): G01R31/3185G05B15/02
CPCG01R31/318555G01R31/318597G05B15/02
Inventor 彭敏强
Owner SANECHIPS TECH CO LTD