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Port multiplexing circuit capable of supporting SPI, I2C, I2CL and UART protocols

A port multiplexing and circuit technology, applied in the field of electronics, can solve the problems of lack of integration of data transmission interface, inconvenient use of chip control, and occupation of port resources, etc., to achieve the effect of low cost, reduction of production cost, and realization of integration.

Inactive Publication Date: 2016-03-30
WUHAN XINCHANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing chips that need data transmission, such as the Fudan microchip series, although compatible with I2C, SPI, UART and other data transmission protocols, the data transmission interface is not integrated and very fragmented, occupying a lot of port resources, which makes the chip The control is inconvenient to use and increases the cost

Method used

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  • Port multiplexing circuit capable of supporting SPI, I2C, I2CL and UART protocols
  • Port multiplexing circuit capable of supporting SPI, I2C, I2CL and UART protocols

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0020] Such as figure 1 As shown, the present invention provides a kind of port multiplexing circuit that supports SPI, I2C, I2CL, UART agreement, and the overall structure of transmission protocol port integrated multiplexing design scheme of the present invention comprises MCU processor, transmission protocol port selection circuit, each protocol control circuit, etc. Wherein, the transmission protocol includes SPI, I2C, I2CL and UART transmission protocols. The transmission protocol port selection circuit is connected to the MCU, and the MCU transmits the two control commands (that is, the values ​​of IFSEL0 and IFSEL1) input through the first and second data transmission interfaces to the transmission protocol port selection circuit, and the transmission protocol port selection circuit according to the control command to determine the transpo...

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Abstract

The present invention discloses a port multiplexing circuit capable of supporting SPI, I2C, I2CL and UART protocols. Multiple transmission protocol ports are integrated to four ports to perform selective multiplexing. The overall structure comprises an MCU processor, a transmission protocol port selection circuit, transmission protocol data control circuits, and the like. The transmission protocol port selection circuit is connected with the MCU processor, and a selected and used transmission protocol is determined through values of MCU inputs IFSEL0 and IFSEL1. Meanwhile, states of four private ports are also determined, and then data circulation transmission of a specific transmission protocol can be achieved. According to the port multiplexing circuit disclosed by the present invention, the problem in port private integrated multiplexing is solved, and the integrated and easily controlled use is realized.

Description

technical field [0001] The invention relates to a port multiplexing circuit supporting SPI, I2C, I2CL and UART protocols, belonging to the field of electronic technology. Background technique [0002] In the field of electronic technology, as the packaging volume of chips becomes smaller and smaller, input and output (IO) resources are also very precious. Many general purpose input and output (GPIO) ports need to be occupied in the realization of many functions. How to make use of them? It is becoming more and more important to realize more functions with limited GPIO port resources. With the continuous development of electronic technology, the use of integrated and specialized ports has been increasingly recognized by scholars and experts. In the existing chips that need data transmission, such as the Fudan microchip series, although compatible with I2C, SPI, UART and other data transmission protocols, the data transmission interface is not integrated and very fragmented, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
CPCG06F13/4282
Inventor 吴爱龙吕锋李玮
Owner WUHAN XINCHANG TECH CO LTD
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