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Method and system for 51 one-chip computer on-system upgrading

A system upgrade, single-chip technology, applied in instruments, electrical digital data processing, static memory, etc., can solve the problem of high cost of removing chips and hardware, and achieve the effect of improving reliability and low cost

Inactive Publication Date: 2006-11-08
GLOBAL INNOVATION AGGREGATORS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the existing problems in the above-mentioned prior art, the purpose of the present invention is to provide a 51 single-chip microcomputer in-system upgrade method and system to solve the problem that the chip and hardware costs are higher when the single-chip microcomputer chip software is upgraded.

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  • Method and system for 51 one-chip computer on-system upgrading
  • Method and system for 51 one-chip computer on-system upgrading
  • Method and system for 51 one-chip computer on-system upgrading

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Embodiment Construction

[0028] Boundary scan interface (JTAG) technology is a popular testability interface technology in the industry at present. It adds boundary scan units on the input and output pins of the chip. These boundary scan units are connected in series to form a JTAG chain and connected to the JTAG interface. Through the control of the JTAG interface, it is possible to isolate the external circuit of the chip, and directly set and scan the level of the internal pin circuit of the chip (in INTEST mode); Perform level setting and scanning (in EXTEST mode). The JTAG interface contains 5 signals: TDO, TDI, TCK, TMS, TRST. TDO is the output interface of the serial data of the JTAG chain; TDI is the input interface of the serial data of the JTAG chain; TCK is the clock signal of the serial data of the JTAG chain; TMS is the control signal controlling the working state of the JTAG chain; TRST is the reset of the JTAG interface Signal, when this signal is 0, the JTAG chain is forced to reset. ...

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Abstract

This invention discloses a method for upgrading 51 single-chip processors on the system including: designing a JTAG interface on the 51 single-chip processor of a single-chip processor system, utilizing the JTAG public instruction to realize upgrade and program to the processor connected with the interface. This invention also discloses a system of 51 single-chip processor system including a 51 single-chip processor, a JTAG interface module for providing the JTAG interface and realizing program and check to the processor connected with the JTAG interface by its level settting and scan function of the JTAG chain to outside pins of the chip, which can program on board directly.

Description

technical field [0001] The invention relates to a single-chip microcomputer system, in particular to a method and a system for upgrading 51 single-chip microcomputers in the system. Background technique [0002] Because of its excellent cost performance, the 51 single-chip microcomputer has been used in the electronic field for decades, and it is still in the ascendant. In addition, the 51 series single-chip microcomputer chip has an on-chip program memory, and the application program can be directly burned on the 51 single-chip microcomputer chip, which can eliminate the ROM circuit outside the chip, making the hardware design of the system relatively simple. [0003] Because the programming software on-chip of the 51 single-chip microcomputer requires a programming voltage of 12V, and the programming device such as ALL-11 is generally used for burning and curing. Therefore, if the on-chip program of the single board needs to be programmed or upgraded, the single-chip micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/445G06F13/00G11C16/06
Inventor 黄鸿贵
Owner GLOBAL INNOVATION AGGREGATORS LLC