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1. (WO2018099182) UNIDIRECTIONAL ELEMENT CONTROL CIRCUIT BASED ON IO INTERFACES

Pub. No.:    WO/2018/099182    International Application No.:    PCT/CN2017/104858
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Sun Oct 01 01:59:59 CEST 2017
IPC: G05B 19/04
Applicants: GUANGZHOU SHIYUAN ELECTRONICS CO., LTD.
广州视源电子科技股份有限公司
GUANGZHOU SHIRUI ELECTRONICS CO., LTD.
广州视睿电子科技有限公司
Inventors: LV, Yangjun
吕阳俊
Title: UNIDIRECTIONAL ELEMENT CONTROL CIRCUIT BASED ON IO INTERFACES
Abstract:
Disclosed is a unidirectional element control circuit based on IO interfaces, comprising a first unidirectional element (D1), a second unidirectional element (D2), a first resistor (R1), a second resistor (R2) and a switch tube (Q1), wherein a control end of the switch tube (Q1) is connected to an IO interface connecting end (GPIO) by means of the first resistor (R1); a common end of the switch tube (Q1) is grounded; an output end of the switch tube (Q1) is connected to a power supply input end (VCC) by means of the second resistor (R2), and direct-current voltage is input to the power supply input end (VCC); the output end of the switch tube (Q1) is also connected to an output end of the first unidirectional element (D1) and an input end of the second unidirectional element (D2); and an input end of the first unidirectional element (D1) and an output end of the second unidirectional element (D2) are both connected to the IO interface connecting end (GPIO). By using the control circuit, it can be realized that one IO interface controls a plurality of unidirectional elements, thereby solving the problems of shortage of IO interface resources in circuit design, and insufficiency of IO interfaces, and the circuit has a simple structure and is low in costs.