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Communication port control circuit

A communication port and control circuit technology, applied in the direction of electrical digital data processing, instruments, etc., can solve problems such as user inconvenience, adjustment errors, etc.

Active Publication Date: 2011-07-20
QUANTA COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, it will cause inconvenience to the user, and every manual adjustment may cause an adjustment error

Method used

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  • Communication port control circuit
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Embodiment Construction

[0018] The present invention proposes a communication port (communication port, COM PORT) control circuit, which uses a simple control circuit and cooperates with the control of the basic input / output system (Basic Input / Output System, BIOS) to make the ringing indication (ring) of the communication port indicator, RI) can be properly set in different states.

[0019] Please refer to figure 1 , which shows a schematic diagram of a communication port and a control circuit according to a preferred embodiment of the present invention. The control circuit 100 and the communication port 130 disclosed in this embodiment can be applied to various types of computers, such as industrial computers. The communication port 130 has a plurality of pins, including a ringing indication pin 139 . The control circuit 100 includes a first selection circuit 110 and a second selection circuit 120 .

[0020] The first selection circuit 110 is controlled by a basic input / output system (not shown ...

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Abstract

A communication port control circuit is disclosed, including a ringing indicative pin. The control circuit comprises a first selection circuit and a second selection circuit. The first selection circuit is controlled by a fundamental input / output system to decide whether a ringing indicative signal is transmitted to the ringing indicative pin. The second selection circuit is controlled by the fundamental input / output system to decide whether a first voltage or a second voltage is transmitted to the ringing indicative pin.

Description

technical field [0001] The invention relates to a communication port control circuit, and in particular to an intelligent communication port control circuit. Background technique [0002] A communication port (communication port, COM PORT) is a common inter-device communication protocol in a computer, which is simple and capable of long-distance communication. The communication port is also used to connect industrial instruments and meters for the improvement of drive and connection. [0003] A communication port, such as RS-232, includes 9 pins, each of which has a different function. Wherein, the ninth pin is a ring indicator (RI) pin, which is usually used to receive a ring indicator signal. However, sometimes it is necessary to output 5 volts or 12 volts by ringing the indicated pin. In the traditional way, the ringing indicator pin is short-circuited with 5 volts or 12 volts by using a jumper in a manual way, so as to use the ringing indicator pin to output 5 volts o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/42
Inventor 许文钟陈良安沈明彦
Owner QUANTA COMPUTER INC
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