CN103346771A - Multi-channel switching control circuit compatible with two kinds of protocols and control method - Google Patents
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Abstract
本发明公开了一种兼容两种协议的多通道切换控制电路,包括一键脉冲控制模块、独立引脚的功能控制模块和逻辑判断模块,一键脉冲控制模块的输出端和独立引脚的功能控制模块的输出端分别与逻辑判断模块的输入端连接,逻辑判断模块的输出端输出通道切换控制信号。本发明还公开了一种多通道切换控制电路采用的控制方法,独立引脚的功能控制模块包括高电平输入端、低电平输入端和功能控制输入端,逻辑判断模块根据功能控制输入端分别与高电平输入端和低电平输入端之间的电平比较,选择输出不同的通道切换控制信号。本发明兼容了两种通信协议并可以根据I/O资源的情况合理控制多通道选择,为系统设计提供相当大的灵活性,能适应更多的系统设计。
The invention discloses a multi-channel switching control circuit compatible with two protocols, including a key pulse control module, a function control module of an independent pin and a logic judgment module, an output terminal of the one key pulse control module and a function of an independent pin The output terminals of the control module are respectively connected with the input terminals of the logic judgment module, and the output terminals of the logic judgment module output channel switching control signals. The invention also discloses a control method adopted by the multi-channel switching control circuit. The function control module of the independent pin includes a high-level input terminal, a low-level input terminal and a function control input terminal, and the logic judgment module controls the input terminal according to the function Comparing with the levels between the high-level input terminal and the low-level input terminal respectively, different channel switching control signals are selected and output. The invention is compatible with two communication protocols and can reasonably control multi-channel selection according to the situation of I/O resources, provides considerable flexibility for system design, and can adapt to more system designs.
Description
技术领域technical field
本发明涉及一种多通道切换控制电路及控制方法,尤其涉及一种兼容两种协议的多通道切换控制电路及控制方法。The invention relates to a multi-channel switching control circuit and a control method, in particular to a multi-channel switching control circuit and a control method compatible with two protocols.
背景技术Background technique
集成电路设计中经常需要对多通道进行切换,所以会用到相应的切换控制电路。目前,多通道切换控制电路主要有一键脉冲控制电路模块和独立引脚的功能控制电路模块,现有的多通道切换控制电路都只选择其中一种电路模块,所以都只有一种协议。In integrated circuit design, it is often necessary to switch multiple channels, so the corresponding switching control circuit will be used. At present, the multi-channel switching control circuit mainly has a key pulse control circuit module and a function control circuit module with independent pins. Existing multi-channel switching control circuits only select one of the circuit modules, so there is only one protocol.
随着现代电子信息产业的蓬勃发展,电子产品向多元化方向衍变,只有一种协议的控制方法在系统设计中缺少了设计的灵活性,也不利于资源的有效利用,在现代新型电子系统的设计中存在很大局限性。具体表现为:独立引脚的功能控制电路模块因为其需要单独的控制I/O进行控制,会给系统设计造成I/O资源的浪费,在主控的I/O资源紧缺的情况下不利于资源的有效应用与合理分配;一键脉冲控制电路模块因为其复用的特性,会让系统的设计更复杂并增加设计的难度,在I/O资源丰富的设计中会造成设计成本的浪费,并降低系统的可靠性。With the vigorous development of the modern electronic information industry, electronic products are evolving in a diversified direction. Only one protocol control method lacks design flexibility in system design and is not conducive to the effective use of resources. In the modern new electronic system There are significant limitations in the design. The specific performance is: the function control circuit module with independent pins requires a separate control I/O for control, which will cause a waste of I/O resources in the system design, which is not conducive to the shortage of I/O resources for the main control. Effective application and reasonable allocation of resources; the one-key pulse control circuit module will make the system design more complicated and increase the difficulty of the design because of its multiplexing characteristics, which will cause waste of design cost in the design with rich I/O resources. And reduce the reliability of the system.
发明内容Contents of the invention
本发明的目的就在于为了解决上述问题而提供一种兼容两种协议的多通道切换控制电路及控制方法。The object of the present invention is to provide a multi-channel switching control circuit and control method compatible with two protocols in order to solve the above problems.
为了达到上述目的,本发明采用了以下技术方案:In order to achieve the above object, the present invention adopts the following technical solutions:
本发明所述兼容两种协议的多通道切换控制电路包括一键脉冲控制模块、独立引脚的功能控制模块和逻辑判断模块,所述一键脉冲控制模块的输出端和所述独立引脚的功能控制模块的输出端分别与所述逻辑判断模块的输入端连接,所述逻辑判断模块的输出端输出通道切换控制信号。The multi-channel switching control circuit compatible with two protocols of the present invention includes a one-key pulse control module, a function control module of independent pins and a logic judgment module, the output terminal of the one-key pulse control module and the The output terminals of the function control module are respectively connected to the input terminals of the logic judgment module, and the output terminals of the logic judgment module output channel switching control signals.
具体地,所述逻辑判断模块包括四个非门、四个与门、两个或非门和一个多路复用器,第一非门的输入端分别与所述独立引脚的功能控制模块的一个输出端、第三与门的输入端和第四与门的输入端对应连接,第二非门的输入端分别与所述独立引脚的功能控制模块的另一个输出端、第二与门的输入端和所述第三与门的输入端连接,所述第一非门的输出端分别与第一与门的输入端和所述第二与门的输入端连接,所述第二非门的输出端分别与所述第一与门的输入端和所述第四与门的输入端连接,所述第一与门的输出端、所述第二与门的输出端和所述第三与门的输出端分别与第一或非门的输入端连接,所述第三与门的输出端和所述第四与门的输出端分别与第二或非门的输入端连接,所述第一或非门的输出端与第三非门的输入端连接,所述第二或非门的输出端与第四非门的输入端连接,所述第三非门的输出端和所述第四非门的输出端分别与所述多路复用器的两个信号输入端连接,所述一键脉冲控制模块的输出端与所述多路复用器的选择输入端连接,所述多路复用器的输出端输出通道切换控制信号。Specifically, the logic judgment module includes four NOT gates, four AND gates, two NOR gates and a multiplexer, and the input terminals of the first NOT gate are connected with the function control module of the independent pins respectively. An output end of the output terminal, the input end of the third AND gate and the input end of the fourth AND gate are correspondingly connected, and the input end of the second NOT gate is respectively connected with the other output end of the function control module of the independent pin, the second AND gate The input end of the gate is connected to the input end of the third AND gate, the output end of the first NOT gate is respectively connected to the input end of the first AND gate and the input end of the second AND gate, and the second AND gate is connected to the input end of the second AND gate. The output terminals of the NOT gate are respectively connected with the input terminals of the first AND gate and the input terminals of the fourth AND gate, the output terminals of the first AND gate, the output terminals of the second AND gate and the The output end of the third AND gate is respectively connected to the input end of the first NOR gate, the output end of the third AND gate and the output end of the fourth AND gate are respectively connected to the input end of the second NOR gate, The output terminal of the first NOR gate is connected with the input terminal of the third NOT gate, the output terminal of the second NOR gate is connected with the input terminal of the fourth NOT gate, and the output terminal of the third NOT gate is connected with the input terminal of the fourth NOT gate. The output terminals of the fourth NOT gate are respectively connected to the two signal input terminals of the multiplexer, the output terminals of the one-key pulse control module are connected to the selection input terminals of the multiplexer, The output terminal of the multiplexer outputs a channel switching control signal.
本发明所述兼容两种协议的多通道切换控制电路采用的控制方法中的所述独立引脚的功能控制模块包括高电平输入端、低电平输入端和功能控制输入端,当所述功能控制输入端的输出信号(该输出信号既包括切换信号又包括逻辑判断信号)的电平高于所述高电平输入端的电平或低于所述低电平输入端的电平时,所述逻辑判断模块根据所述一键脉冲控制模块的输出信号和所述功能控制输入端的输出信号的不同电位选择输出信号;当所述功能控制输入端的输出信号的电平低于所述高电平输入端的电平且高于所述低电平输入端的电平时,所述逻辑判断模块的输出端输出所述一键脉冲控制模块的输出端信号。The function control module of the independent pin in the control method adopted by the multi-channel switching control circuit compatible with two protocols of the present invention includes a high-level input terminal, a low-level input terminal and a function control input terminal. When the level of the output signal of the function control input terminal (the output signal includes both the switching signal and the logic judgment signal) is higher than the level of the high level input terminal or lower than the level of the low level input terminal, the logic The judgment module selects the output signal according to the different potentials of the output signal of the one-key pulse control module and the output signal of the function control input terminal; when the level of the output signal of the function control input terminal is lower than that of the high level input terminal level and higher than the level of the low-level input terminal, the output terminal of the logic judgment module outputs the output terminal signal of the one-key pulse control module.
本发明的有益效果在于:The beneficial effects of the present invention are:
本发明兼容了两种通信协议以控制多通道选择,为系统设计提供相当大的灵活性,能适应更多的系统设计;在系统设计时可以根据I/O资源的情况合理选择控制方式:在I/O资源丰富的情况下可以选择用独立的功能管脚进行控制,这样有利于减小系统设计的复杂性;而在I/O资源紧缺的情况下则可以选择用一键脉冲复用管脚的方式进行控制,可以节约控制端口以降低系统设计的成本。The present invention is compatible with two communication protocols to control multi-channel selection, provides considerable flexibility for system design, and can adapt to more system designs; during system design, the control mode can be reasonably selected according to the situation of I/O resources: in In the case of abundant I/O resources, you can choose to use independent function pins for control, which is beneficial to reduce the complexity of system design; and in the case of shortage of I/O resources, you can choose to use a key pulse multiplexing tube The way of pin control can save the control port to reduce the cost of system design.
附图说明Description of drawings
图1是本发明所述兼容两种协议的多通道切换控制电路的总体框图;Fig. 1 is the overall block diagram of the multi-channel switching control circuit compatible with two protocols of the present invention;
图2是本发明所述逻辑判断模块的电路图;Fig. 2 is the circuit diagram of logical judgment module of the present invention;
图3是本发明所述一键脉冲控制模块的电路图;Fig. 3 is the circuit diagram of a key pulse control module of the present invention;
图4是本发明所述独立引脚的功能控制模块的电路图。Fig. 4 is a circuit diagram of the function control module of the independent pins of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明作进一步具体描述:Below in conjunction with accompanying drawing, the present invention is described in further detail:
如图1所示,本发明所述兼容两种协议的多通道切换控制电路包括一键脉冲控制模块、独立引脚的功能控制模块和逻辑判断模块,一键脉冲控制模块的输出端和独立引脚的功能控制模块的输出端分别与逻辑判断模块的输入端连接,逻辑判断模块的输出端输出通道切换控制信号。As shown in Figure 1, the multi-channel switching control circuit compatible with two protocols of the present invention includes a key pulse control module, a function control module and a logic judgment module of independent pins, an output terminal of the one key pulse control module and an independent pin The output terminals of the pin function control module are respectively connected with the input terminals of the logic judgment module, and the output terminals of the logic judgment module output channel switching control signals.
如图2所示,逻辑判断模块包括四个非门、四个与门、两个或非门和一个多路复用器41,第一非门11的输入端分别与独立引脚的功能控制模块的一个输出端ABPIN(见图4)、第三与门23的输入端和第四与门24的输入端对应连接,第二非门12的输入端分别与独立引脚的功能控制模块的另一个输出端DPIN(见图4)、第二与门22的输入端和第三与门23的输入端连接,第一非门11的输出端分别与第一与门21的输入端和第二与门22的输入端连接,第二非门12的输出端分别与第一与门21的输入端和第四与门24的输入端连接,第一与门21的输出端、第二与门22的输出端和第三与门23的输出端分别与第一或非门31的输入端连接,第三与门23的输出端和第四与门24的输出端分别与第二或非门32的输入端连接,第一或非门31的输出端与第三非门13的输入端连接,第二或非门32的输出端与第四非门14的输入端连接,第三非门13的输出端和第四非门14的输出端分别与多路复用器41的两个信号输入端连接,一键脉冲控制模块的输出端SD(见图3的输出SD)与多路复用器41的选择输入端连接,多路复用器41的输出端输出通道切换控制信号。多路复用器41为常规器件,也称为可控反相器,具体结构见图2所示。As shown in Figure 2, the logic judgment module comprises four NOT gates, four AND gates, two NOR gates and a
如图3所示,一键脉冲控制模块采用常规结构,由一个非门和两个触发器构成。As shown in Figure 3, the one-key pulse control module adopts a conventional structure and consists of a NOT gate and two flip-flops.
如图4所示,独立引脚的功能控制模块采用常规结构,由两个比较器和四个非门构成。As shown in Figure 4, the function control module of independent pins adopts a conventional structure, consisting of two comparators and four NOT gates.
结合图1、图3和图4,本发明所述兼容两种协议的多通道切换控制电路采用的控制方法中的独立引脚的功能控制模块包括高电平输入端V1、低电平输入端V2和功能控制输入端IN,当功能控制输入端IN的输出信号的电平高于高电平输入端V1的电平或低于低电平输入端V2的电平时,逻辑判断模块根据一键脉冲控制模块的输出信号和功能控制输入端IN的输出信号的不同电位选择输出信号;当功能控制输入端IN的输出信号的电平低于高电平输入端V1的电平且高于低电平输入端V2的电平时,逻辑判断模块的输出端输出一键脉冲控制模块的输出端信号,从而实现根据I/O资源的情况合理选择控制方式的目的。In conjunction with Fig. 1, Fig. 3 and Fig. 4, the function control module of the independent pin in the control method adopted by the multi-channel switching control circuit compatible with two protocols of the present invention includes a high-level input terminal V1, a low-level input terminal V2 and the function control input terminal IN, when the level of the output signal of the function control input terminal IN is higher than the level of the high level input terminal V1 or lower than the level of the low level input terminal V2, the logic judgment module The output signal of the pulse control module is different from the output signal of the function control input terminal IN to select the output signal; when the level of the output signal of the function control input terminal IN is lower than the level of the high level input terminal V1 and higher than the level of the low level input terminal When the level of the input terminal V2 is equal, the output terminal of the logic judgment module outputs the output terminal signal of the one-key pulse control module, so as to achieve the purpose of reasonably selecting the control mode according to the situation of the I/O resources.
上述实施例仅仅是基于本发明基本技术方案的一个较佳实施例,不能以此来限定本发明的保护范围,任何对本发明所述电路作本技术领域内熟知的部件替换、组合、分立,以及对本发明所述控制方法作本技术领域内熟知的等同改变或替换,均不超出本发明专利的保护范围。The above-described embodiment is only a preferred embodiment based on the basic technical solution of the present invention, and cannot limit the protection scope of the present invention with this. Any replacement, combination, separation, and Any equivalent changes or replacements known in the technical field to the control method of the present invention will not exceed the protection scope of the patent of the present invention.
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CN112630621B (en) * | 2020-12-16 | 2023-04-28 | 北京集创北方科技股份有限公司 | Pin short circuit detection circuit and detection method |
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CN114048159B (en) * | 2022-01-11 | 2022-04-22 | 深圳市微源半导体股份有限公司 | Port multiplexing circuit and electronic equipment |
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