Multiplex design circuit of systematic physical key
A button and physical technology, applied in the direction of circuits, electric switches, electrical components, etc., can solve the problem that the automatic switch machine solution cannot be adopted, and achieve the effect of convenient system debugging and convenience
Inactive Publication Date: 2015-06-03
CHENGDU UNIV OF INFORMATION TECH +1
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Problems solved by technology
However, in many real-time operations, the automatic switch-on solution cannot be used as an object
Method used
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Embodiment 1
[0017] Such as figure 1 shown.
[0018] System physical button multiplexing design circuit, including emergency signal input terminal, emergency resistor R24, switch resistor R8 connected in series, switch signal input terminal, switch resistor R68, emergency resistor R69, emergency signal output terminal connected in series, and emergency signal output terminal The switch J11 is connected to the emergency resistor R24, the switch resistor R8, the switch resistor R68, and the emergency resistor R69 at the same time.
[0019] Switch J11 comprises four switch pins respectively: emergency signal input pin 1, switch signal output pin 2, switch signal input pin 3, emergency signal output pin 4; R24 is connected to one end away from the emergency signal input terminal; the switch signal output pin 2 is connected to the end of the switch resistor R8 close to the emergency resistor R24; the switch signal input pin 3 is connected to the end of the switch resistor R68 away from the swi...
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The invention discloses a multiplex design circuit of a systematic physical key. The multiplex design circuit of the systematic physical key comprises an emergency signal input terminal, an emergency resistance R 24 and a switch resistance R8, and the emergency signal input terminal, the emergency resistance R 24 and the switch resistance R 8 are connected in sequence and in series. The multiplex design circuit of the systematic physical key further comprises a switch signal input terminal, a switch resistance R 68, an emergency resistance R 69 and an emergency signal output terminal, and the switch signal input terminal, the switch resistance R 68, the emergency resistance R 69 and the emergency signal output terminal are connected in sequence and in series. The multiplex design circuit of the systematic physical key further comprises a switch J 11 which is simultaneously connected with the emergency resistance R 24, the switch resistance R 8, the switch resistance R 68 and the emergency resistance R 69. The multiplex design circuit of the systematic physical key has the advantages of enabling a system to be conveniently debugged and taking convenience of research and development and debugging into account on the premise of not redesigning a printed circuit board (PCB).
Description
technical field [0001] The invention relates to a key switch circuit, in particular to a system physical key multiplexing design circuit. Background technique [0002] Ordinary key switch circuit, the device can be turned on immediately after pressing the power button, and the device will be turned off immediately after the second key is pressed. In some electronic product equipment, especially handheld devices, such as mobile phones, etc., the long key switch control circuit is used: for example, the switch of the mobile phone, the general switch process of the mobile phone is to press the switch button when the phone is turned on. The action of the power on / off button is long enough, as long as the pressing time of the key is less than the time of the mobile phone in advance, the device will not produce any power on / off operation (that is, the long key power on and off means that the device will start up after pressing the power on and off for a long enough time). The adv...
Claims
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IPC IPC(8): H01H13/02H01H9/54
Inventor 刘俊张金蓉王海江郭在华秦开宇
Owner CHENGDU UNIV OF INFORMATION TECH