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MCU (Microprogrammed Control Unit), host and data transmitting method for multiple MCUs

A technology for transmitting data and hosts, applied in the field of electronics to achieve low-cost effects

Active Publication Date: 2021-10-15
SHANGHAI ANALOGY SEMICON TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

JTAG (Joint Test Action Group) is a widely used protocol and IEEE standard, but the protocol requires at least 4 pins for testing and debugging, which is unacceptable for low-cost MCUs
In addition, JTAG also requires a typical state machine to complete the test process, which requires additional logic (cost), which is also unacceptable in low-cost MCUs

Method used

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  • MCU (Microprogrammed Control Unit), host and data transmitting method for multiple MCUs

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Embodiment Construction

[0030] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that the technical solutions claimed in this application can be realized even without these technical details and various changes and modifications based on the following implementation modes.

[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manner of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0032] An embodiment of the present application discloses an MCU, figure 1 A schematic structural diagram of an MCU in an embodiment is shown. The MCU includes a one-way clock interface DCK and a two-way data interface DDA, and is connected to the host (Host) through the clock interface DCK and the data interface DDA to realize communication between the h...

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Abstract

The invention relates to the technical field of electronics, and discloses a method for data transmission between a host and a plurality of MCUs and the MCUs. The host and the plurality of MCUs are connected to form a daisy chain structure, the host and the plurality of MCUs respectively comprise a one-way clock interface and a two-way data interface, a data packet transmitted by the data interface comprises a start code, a lead code, a payload code and a termination code which are arranged in sequence, and the preamble defines a type of the data packet. The method comprises the following steps: when the host writes data into the MCUs, the host sends a clock signal with a fixed period and a data packet to a plurality of MCUs, and the plurality of MCUs determine the type of the written data according to a lead code in the data packet and write the data of a payload area in the data packet into a target MCU; and when the host reads data from the MCUs, the host sends a clock signal and a data packet with a fixed period to the plurality of MCUs, and when the host detects that the data interface of the target MCU is enabled, the host reads the data from the target MCU according to the data type defined by the lead code.

Description

technical field [0001] The invention generally relates to the field of electronic technology, in particular to a method for transmitting data between an MCU, a host computer and multiple MCUs. Background technique [0002] There is no open or common standard / protocol for low-cost MCUs (Microcontroller Units) like 8051, and major players like Silabs are using their own internal protocols. JTAG (Joint Test Action Group, Joint Test Working Group) is a widely used protocol and IEEE standard, but the protocol requires at least 4 pins for testing and debugging, which is unacceptable for low-cost MCUs. In addition, JTAG also requires a typical state machine to complete the test process, which requires additional logic (cost), which is also unacceptable in low-cost MCUs. This invention introduces an innovative approach for low-cost MCUs to overcome the aforementioned limitations. Contents of the invention [0003] The purpose of the embodiments of this specification is to provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F15/163G06F11/10
CPCG06F15/163G06F11/1004
Inventor 梅汪生张俊
Owner SHANGHAI ANALOGY SEMICON TECH LTD