Composite serial port circuit

A circuit and serial port technology, applied in the field of composite serial port circuits, can solve problems such as different communication modes, inconvenient use, and increased costs, and achieve the effects of convenient communication, reduced quantity, and cost-saving equipment

Inactive Publication Date: 2017-12-08
深圳市三旺通信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing serial devices on the market are of a single mode, such as RS232 serial devices, RS485 serial devices, RS422 serial devices, etc., but the communication modes supported by field devices are different, which will lead to many disadvantages
For example, there are devices supporting 232 mode and devices supporting 485 mode on site, one serial port server will not be able to meet the needs of the site, so multiple serial port servers supporting different modes must be purchased, which will increase the cost and occupy more space. Multiple spaces cause inconvenience in use

Method used

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  • Composite serial port circuit
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Embodiment Construction

[0010] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0011] The specific realization of the present invention is described in detail below in conjunction with specific embodiment:

[0012] Such as figure 1 As shown, a compound serial port circuit includes: 232 interface chip, 232 receiving signal detection and control circuit, non-232 interface chip and interface end, the 232 interface receiving end of the interface end is connected with the signal acquisition end of 232 receiving signal detection and control circuit , the 232 interface enabling output ends of the 232 receiving signal detection control circuit are connected with the enabling end of ...

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PUM

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Abstract

The invention belongs to the technical field of communication serial ports, and discloses a composite serial port circuit. The composite serial port circuit comprises a 232 interface chip, a 232 receipt signal detection and control circuit, a non 232 interface chip and an interface port; when the 232 receipt signal detection and control circuit collects a level signal of the 232 interface receiving end of the interface port, the 232 interface chip is set to be enabled, and the non 232 interface chip is set to be in a high-impedance state; when the 232 receipt signal detection and control circuit does not collect a level signal of the 232 interface receiving end of the interface port, the non 232 interface chip is set to be enabled, and the 232 interface chip is set to be in a high-impedance state. Accordingly, the number of serial port devices can be reduced, the number of serial cables can be reduced, and serial port communication among communication devices can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of communication serial ports, and in particular relates to a compound serial port circuit. Background technique [0002] In the current industrial site, there are many types of devices using serial port protocols. For example, RS232, 485, 422, CAN and other devices with different protocols cannot communicate directly, and need to rely on intermediate devices that support their protocols to communicate. The resulting problems are as follows: [0003] In the current industrial site, a large number of serial devices are used to enable each device to communicate. Most of the existing serial devices on the market are of a single mode, such as RS232 serial devices, RS485 serial devices, RS422 serial devices, etc., but the communication modes supported by the field devices are different, which will lead to many disadvantages. For example, there are devices supporting 232 mode and devices supporting 485 mode on s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/42
Inventor 熊伟
Owner 深圳市三旺通信股份有限公司
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