CN103346771B - The multichannel control switching circuit of compatible two kinds of agreements and control method - Google Patents
The multichannel control switching circuit of compatible two kinds of agreements and control method Download PDFInfo
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- CN103346771B CN103346771B CN201310168026.2A CN201310168026A CN103346771B CN 103346771 B CN103346771 B CN 103346771B CN 201310168026 A CN201310168026 A CN 201310168026A CN 103346771 B CN103346771 B CN 103346771B
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Abstract
The invention discloses a kind of multichannel control switching circuit of compatible two kinds of agreements, comprise a key pulse control module, the functional control module of individual pin and logic judgment module, the output of one key pulse control module is connected with the input of logic judgment module respectively with the output of the functional control module of individual pin, the output output channel switch-over control signal of logic judgment module.The invention also discloses the control method that a kind of multichannel control switching circuit adopts, the functional control module of individual pin comprises high level input, low level input and function control input end, logic judgment module compares with the level between high level input and low level input respectively according to function control input end, selects to export different passage bridge control signals.Two kinds of communication protocols that the present invention is compatible also according to the situation conservative control multi-center selection of I/O resource, for system provides sizable flexibility, can adapt to more system.
Description
Technical field
The present invention relates to a kind of multichannel control switching circuit and control method, particularly relate to a kind of multichannel control switching circuit and control method of compatible two kinds of agreements.
Background technology
Often need in integrated circuit (IC) design to switch multichannel, so corresponding control switching circuit can be used.At present, multichannel control switching circuit mainly contains the function control circuit module of a key pulse control circuit module and individual pin, and existing multichannel control switching circuit all only selects wherein a kind of circuit module, so all only have a kind of agreement.
Along with hyundai electronics development of information industry, electronic product develops to diversification direction, only had a kind of control method of agreement to lack in system design flexibility, be also unfavorable for effective utilization of resource, in the design of Modern New electronic system, there is very large limitation.Be embodied in: the function control circuit module of individual pin, because it needs independent control I/O to control, can cause the waste of I/O resource, be unfavorable for effective application and the reasonable distribution of resource when the I/O resource scarcity of master control to system; One key pulse control circuit module, because its multiplexing characteristic, can allow the design of system more complicated and increase the difficulty designed, can cause the waste of design cost, and reduce the reliability of system in the resourceful design of I/O.
Summary of the invention
Object of the present invention is just the multichannel control switching circuit and the control method that provide a kind of compatible two kinds of agreements in order to solve the problem.
In order to achieve the above object, present invention employs following technical scheme:
The multichannel control switching circuit of compatible two kinds of agreements of the present invention comprises a key pulse control module, the functional control module of individual pin and logic judgment module, the described output of a key pulse control module is connected with the input of described logic judgment module respectively with the output of the functional control module of described individual pin, the output output channel switch-over control signal of described logic judgment module.
Particularly, described logic judgment module comprises four not gates, four and door, two NOR gate and a multiplexer, the input of the first not gate respectively with an output of the functional control module of described individual pin, 3rd correspondingly with an input of door to be connected with an input of door and the 4th, the input of the second not gate respectively with another output of the functional control module of described individual pin, second is connected with another input of door with an input and the described 3rd of door, the output of described first not gate is connected with another input of door with an input and described second of door with first respectively, the output of described second not gate is connected with another input of door with another input and the described 4th of door with described first respectively, described first with the output of door, described second is connected with the input of the first NOR gate with the output of door respectively with the output and the described 3rd of door, described 3rd is connected with the input of the second NOR gate with the output of door respectively with the output and the described 4th of door, the output of described first NOR gate is connected with the input of the 3rd not gate, the output of described second NOR gate is connected with the input of the 4th not gate, the output of described 3rd not gate is connected with two signal input parts of described multiplexer respectively with the output of described 4th not gate, the described output of a key pulse control module is connected with the selection input of described multiplexer, the output output channel switch-over control signal of described multiplexer.
The functional control module of the described individual pin in the control method of the multichannel control switching circuit employing of compatible two kinds of agreements of the present invention comprises high level input, low level input and function control input end, when the level of level higher than described high level input of output signal (this output signal not only comprises switching signal but also comprise Logic judgment signal) of described function control input end or the level lower than described low level input, described logic judgment module selects output signal according to the different potentials of the output signal of a described key pulse control module and the output signal of described function control input end, when the level of the output signal of described function control input end lower than the level of described high level input and level higher than described low level input time, the output of described logic judgment module exports the output end signal of a described key pulse control module.
Beneficial effect of the present invention is:
Two kinds of communication protocols that the present invention is compatible, to control multi-center selection, for system provides sizable flexibility, can adapt to more system; Can according to the situation choose reasonable control mode of I/O resource when system: can select to control with independently function pin in the resourceful situation of I/O, be conducive to the complexity reducing system like this; Then can select when I/O resource scarcity to control by the mode of a key pulse complexing pin, control port can be saved to reduce the cost of system.
Accompanying drawing explanation
Fig. 1 is the general frame of the multichannel control switching circuit of compatible two kinds of agreements of the present invention;
Fig. 2 is the circuit diagram of logic judgment module of the present invention;
Fig. 3 is the circuit diagram of a key pulse control module of the present invention;
Fig. 4 is the circuit diagram of the functional control module of individual pin of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described in detail:
As shown in Figure 1, the multichannel control switching circuit of compatible two kinds of agreements of the present invention comprises a key pulse control module, the functional control module of individual pin and logic judgment module, the output of one key pulse control module is connected with the input of logic judgment module respectively with the output of the functional control module of individual pin, the output output channel switch-over control signal of logic judgment module.
As shown in Figure 2, logic judgment module comprises four not gates, four and door, two NOR gate and a multiplexer 41, the input of the first not gate 11 respectively with an output terminals A BPIN (see Fig. 4) of the functional control module of individual pin, 3rd correspondingly with an input of door 24 to be connected with an input of door 23 and the 4th, the input of the second not gate 12 respectively with another output DPIN (see Fig. 4) of the functional control module of individual pin, second is connected with another input of door 23 with an input and the 3rd of door 22, the output of the first not gate 11 is connected with another input of door 22 with an input and second of door 21 with first respectively, the output of the second not gate 12 is connected with another input of door 24 with another input and the 4th of door 21 with first respectively, first with the output of door 21, second is connected with the input of the first NOR gate 31 with the output of door 23 respectively with the output and the 3rd of door 22, 3rd is connected with the input of the second NOR gate 32 with the output of door 24 respectively with the output and the 4th of door 23, the output of the first NOR gate 31 is connected with the input of the 3rd not gate 13, the output of the second NOR gate 32 is connected with the input of the 4th not gate 14, the output of the 3rd not gate 13 is connected with two signal input parts of multiplexer 41 respectively with the output of the 4th not gate 14, the output SD (the output SD see Fig. 3) of one key pulse control module is connected with the selection input of multiplexer 41, the output output channel switch-over control signal of multiplexer 41.Multiplexer 41 is conventional device, and also referred to as controllable inverter, concrete structure as shown in Figure 2.
As shown in Figure 3, a key pulse control module adopts conventional structure, is made up of a not gate and two triggers.
As shown in Figure 4, the functional control module of individual pin adopts conventional structure, is made up of two comparators and four not gates.
Composition graphs 1, Fig. 3 and Fig. 4, the functional control module of the individual pin in the control method of the multichannel control switching circuit employing of compatible two kinds of agreements of the present invention comprises high level input V1, low level input V2 and function control input end IN, when the level of level higher than high level input V1 of the output signal of function control input end IN or the level lower than low level input V2, logic judgment module selects output signal according to the different potentials of the output signal of the output signal of a key pulse control module and function control input end IN; When the level of the output signal of function control input end IN lower than the level of high level input V1 and level higher than low level input V2 time, the output of logic judgment module exports the output end signal of a key pulse control module, thus realizes the object according to the situation choose reasonable control mode of I/O resource.
Above-described embodiment is only a preferred embodiment based on basic technical scheme of the present invention; protection scope of the present invention can not be limited with this; any circuit of the present invention is done that parts well know in the art are replaced, combination, discrete; and equivalent change well know in the art or replacement are done to control method of the present invention, all do not exceed the protection range of patent of the present invention.
Claims (2)
1. the multichannel control switching circuit of a compatibility two kinds of agreements, comprise the functional control module of a key pulse control module and individual pin, it is characterized in that: also comprise logic judgment module, the described output of a key pulse control module is connected with the input of described logic judgment module respectively with the output of the functional control module of described individual pin, the output output channel switch-over control signal of described logic judgment module, described logic judgment module comprises four not gates, four and door, two NOR gate and a multiplexer, the input of the first not gate respectively with an output of the functional control module of described individual pin, 3rd correspondingly with an input of door to be connected with an input of door and the 4th, the input of the second not gate respectively with another output of the functional control module of described individual pin, second is connected with another input of door with an input and the described 3rd of door, the output of described first not gate is connected with another input of door with an input and described second of door with first respectively, the output of described second not gate is connected with another input of door with another input and the described 4th of door with described first respectively, described first with the output of door, described second is connected with the input of the first NOR gate with the output of door respectively with the output and the described 3rd of door, described 3rd is connected with the input of the second NOR gate with the output of door respectively with the output and the described 4th of door, the output of described first NOR gate is connected with the input of the 3rd not gate, the output of described second NOR gate is connected with the input of the 4th not gate, the output of described 3rd not gate is connected with two signal input parts of described multiplexer respectively with the output of described 4th not gate, the described output of a key pulse control module is connected with the selection input of described multiplexer, the output output channel switch-over control signal of described multiplexer.
2. the control method of the multichannel control switching circuit employing of compatible two kinds of agreements as claimed in claim 1, the functional control module of described individual pin comprises high level input, low level input and function control input end, it is characterized in that: when the level of level higher than described high level input of the output signal of described function control input end or the level lower than described low level input, described logic judgment module selects output signal according to the different potentials of the output signal of a described key pulse control module and the output signal of described function control input end, when the level of the output signal of described function control input end lower than the level of described high level input and level higher than described low level input time, the output of described logic judgment module exports the output end signal of a described key pulse control module.
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| CN109542017B (en) * | 2018-12-13 | 2023-11-21 | 珠海格力电器股份有限公司 | Communication circuit switching method and communication circuit switching circuit |
| CN110119109A (en) * | 2019-04-10 | 2019-08-13 | 汉腾汽车有限公司 | A kind of high effectively low effective compatible type input circuit of automobile controller |
| CN111865423B (en) * | 2019-04-24 | 2021-06-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111398786B (en) * | 2020-04-02 | 2020-12-25 | 上海燧原科技有限公司 | Switching control circuit, system-on-chip, chip test system and method |
| 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 |
| 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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| CN1315710A (en) * | 2000-03-23 | 2001-10-03 | 深圳市桑夏计算机与人工智能开发有限公司 | Multifunctional intelligent internet terminal for network access at public place |
| CN1633128A (en) * | 2004-12-31 | 2005-06-29 | 北京中星微电子有限公司 | A communication transmission control device and method for implementing communication protocol control |
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| CN100444788C (en) * | 2006-01-17 | 2008-12-24 | 山东优加利信息科技有限公司 | Remote mobile electrophysiological data monitoring method and apparatus based on WAN |
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| CN1315710A (en) * | 2000-03-23 | 2001-10-03 | 深圳市桑夏计算机与人工智能开发有限公司 | Multifunctional intelligent internet terminal for network access at public place |
| CN1633128A (en) * | 2004-12-31 | 2005-06-29 | 北京中星微电子有限公司 | A communication transmission control device and method for implementing communication protocol control |
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Effective date of registration: 20191213 Address after: 211500 No. 95 Xingang Road, Longchi Street, Liuhe District, Nanjing City, Jiangsu Province Patentee after: Nanjing Susen Electronic Co., Ltd Address before: High tech Zone Gaopeng road in Chengdu city of Sichuan province 610041 5 block A No. 2 A-320 Patentee before: Chengdu Moyi Technology Co., Ltd. |