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Integrated circuit pin multi-mode representing method and external circuit thereof

An integrated circuit, multi-state technology, applied in the direction of logic circuit connection/interface layout, logic circuit, electrical components, etc., can solve the problem that the integrated circuit pins cannot represent 4 states, etc., to improve anti-interference ability, reduce cost, The effect of enhancing competitiveness

Active Publication Date: 2015-07-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pin is an output state for the indicator light and an input state for the keyboard, it is no problem to reuse one pin for the indicator light and the button, but the two states of the indicator light and the two states of the button are in the pin The conflict occurs at the place, so under normal circumstances, it is impossible to use one integrated circuit pin to represent the 4 states of two things

Method used

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  • Integrated circuit pin multi-mode representing method and external circuit thereof
  • Integrated circuit pin multi-mode representing method and external circuit thereof
  • Integrated circuit pin multi-mode representing method and external circuit thereof

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Embodiment Construction

[0019] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the following combination Attached picture The specific embodiment of the present invention will be described in detail.

[0020] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.

[0021] Combine below Attached picture And embodiment further illustrate the present invention.

[0022] This embodiment provides a multi-state representation method for integrated circuit pins, which processes the high potential of a pin of the integrated circuit into two ...

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Abstract

The invention relates to the technical field of integrated circuits, in particular to an integrated circuit pin multi-mode representing method. The integrated circuit pin multi-mode representing method is characterized in that logical circuits with different potentials are arranged in an integrated circuit pin, the high potential of the integrated circuit pin is processed to be a high level and a low level which serve as the output to be scanned through the built-in logical circuits, and the low potential of the integrated circuit pin is processed to be a high level and a low level which serve as the input to be scanned. By means of the integrated circuit pin multi-mode representing method and an external circuit thereof, one pin for multiple modes can be achieved, the pin number of a chip can be reduced, and therefore the cost of the chip is reduced.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a multi-state representation method of integrated circuit pins and an external circuit thereof. Background technique [0002] As we all know, a digital integrated circuit pin can have three states, that is, 0 state, 1 state and high-impedance state. Generally, 0 state and 1 state can be used to represent two aspects of an event. For example, a digital pin connected to When an LED indicator is connected to the ground potential, the output 1-state indicator is on, and the output 0-state indicator is off; while the high-impedance state is generally used in the bus, the port outputs 0 or 1 state when the bus is used, and the output is high when the bus is not used. resistance state. Therefore, the state that a digital integrated circuit pin can represent is very limited. like figure 1 As shown, a pin drives an LED indicator light, the indicator light is off when the pi...

Claims

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Application Information

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IPC IPC(8): H03K19/00H03K19/0175
Inventor 施隆照
Owner FUZHOU UNIV