CN102176589A - Concentrator for universal serial bus (USB)-8 serial port RS422 - Google Patents
Concentrator for universal serial bus (USB)-8 serial port RS422 Download PDFInfo
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- CN102176589A CN102176589A CN2010106217451A CN201010621745A CN102176589A CN 102176589 A CN102176589 A CN 102176589A CN 2010106217451 A CN2010106217451 A CN 2010106217451A CN 201010621745 A CN201010621745 A CN 201010621745A CN 102176589 A CN102176589 A CN 102176589A
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Abstract
The invention relates to a concentrator, in particular relates to a concentrator for a universal serial bus (USB)-8 serial port RS422. The concentrator is characterized in that a USB interface expending chip is electrically connected with a USB plug and an electrically erasable programmable read-only memory (EEPROM) through a lead; the USB interface expending chip is respectively connected with level translator chips 1-8 in series through USB translator serial port chips 1-8; and the level translator chips 1-8 are respectively connected with RS422 ports 1-8 in series. The resources of hardware interfaces of a master plate are not occupied by the concentrator, and a drive program is simple and easy to write.
Description
Technical field
The present invention relates to a kind of hub, particularly USB-8 serial ports RS422 hub.
Background technology
Computer develop rapidly at present, USB interface is used very extensive.And on industry and national defence, the RS422 Application of Interface is very extensive, and the industrial computer mainboard provides serial ports seldom, and the main mode that adopts is the special-purpose RS422 interface integrated circuit board of expansion at present, and the shortcoming of using this card is to take the motherboard hardware interface resource.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of USB-8 serial ports RS422 hub, it does not take the motherboard hardware interface resource, and driver is simple and easy to write.
The present invention solves the technical scheme that its technical problem takes: the USB interface extended chip is electrically connected with USB plug and EEPROM by lead, the USB interface extended chip also changes serial port chip 1-8 by USB and is connected in series with level transferring chip 1-8 respectively, and level transferring chip 1-8 is connected in series with RS422 mouth 1-8 respectively.
The present invention has following advantage: (1), hub are the plug and play mode, promptly can be used as serial ports RS422 after installation drives and use, and be easy to operate; (2), only need to insert the computer USB interface, but, need not additionally provide power supply in the outside with regard to powered operation; (3), adopt wide temperature industrial level chip, be more suitable under adverse circumstances such as industry, using; (4), volume is little, be convenient to install, carry and field adjustable.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Accompanying drawing is principle of the invention figure.
Embodiment
As shown in drawings, the USB interface extended chip is electrically connected with USB plug and EEPROM by lead, and the USB interface extended chip also changes serial port chip 1-8 by USB and is connected in series with level transferring chip 1-8 respectively, and level transferring chip 1-8 is connected in series with RS422 mouth 1-8 respectively.
Described USB changes serial port chip 1-8 and level transferring chip 1-8 is all wide temperature industrial level chip.
Described USB plug is used for being connected with computer USB mouth, simultaneously from the computer power taking, offers whole module work.Described USB interface extended chip and peripheral chip are extended to 8 USB interface with 1 USB, and every road USB interface connects USB simultaneously changes serial port chip, usb signal is converted to the serial port signal of Transistor-Transistor Logic level.Because the Transistor-Transistor Logic level transmission range is limited, Transistor-Transistor Logic level being converted to differential signal again is the RS422 interface, and is connected on the aerial lug.
USB-8 serial ports RS422 hub can be received and dispatched data for the two-way operation mode.After USB interface was inserted into computer, computer can Direct Recognition arrive adding hardware equipment, and the prompting install driver, after installing, can wherein increase by 8 serial equipments in equipment control.Can operate 8 RS422 interfaces respectively or simultaneously this moment.
Claims (2)
1. USB-8 serial ports RS422 hub, it is characterized in that: the USB interface extended chip is electrically connected with USB plug and EEPROM by lead, the USB interface extended chip also changes serial port chip 1-8 by USB and is connected in series with level transferring chip 1-8 respectively, and level transferring chip 1-8 is connected in series with RS422 mouth 1-8 respectively.
2. USB-8 serial ports RS422 hub according to claim 1 is characterized in that: described USB changes serial port chip 1-8 and level transferring chip 1-8 is all wide temperature industrial level chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106217451A CN102176589A (en) | 2010-12-27 | 2010-12-27 | Concentrator for universal serial bus (USB)-8 serial port RS422 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106217451A CN102176589A (en) | 2010-12-27 | 2010-12-27 | Concentrator for universal serial bus (USB)-8 serial port RS422 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102176589A true CN102176589A (en) | 2011-09-07 |
Family
ID=44519707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106217451A Pending CN102176589A (en) | 2010-12-27 | 2010-12-27 | Concentrator for universal serial bus (USB)-8 serial port RS422 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102176589A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050123A (en) * | 2013-03-15 | 2014-09-17 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN105446431A (en) * | 2015-12-28 | 2016-03-30 | 天津浩丞恒通科技有限公司 | Multi-serial-port expansion board used for CPCI system |
| CN107404731A (en) * | 2016-05-20 | 2017-11-28 | 佛山市顺德区美的电热电器制造有限公司 | The test system and method for testing of wireless communication module |
| CN111856522A (en) * | 2020-06-24 | 2020-10-30 | 深圳航天东方红海特卫星有限公司 | High-speed serial port power supply integrated tester for microsatellite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070083689A1 (en) * | 2002-09-03 | 2007-04-12 | Tae-Keun Jeon | USB system having card-type USB interface connector |
| CN201130376Y (en) * | 2007-12-19 | 2008-10-08 | 深圳市三旺通信技术有限公司 | Expander for USB multiple serial ports |
-
2010
- 2010-12-27 CN CN2010106217451A patent/CN102176589A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070083689A1 (en) * | 2002-09-03 | 2007-04-12 | Tae-Keun Jeon | USB system having card-type USB interface connector |
| CN201130376Y (en) * | 2007-12-19 | 2008-10-08 | 深圳市三旺通信技术有限公司 | Expander for USB multiple serial ports |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050123A (en) * | 2013-03-15 | 2014-09-17 | 联想(北京)有限公司 | Information processing method and electronic device |
| CN104050123B (en) * | 2013-03-15 | 2016-12-28 | 联想(北京)有限公司 | The method of information processing and electronic equipment |
| CN105446431A (en) * | 2015-12-28 | 2016-03-30 | 天津浩丞恒通科技有限公司 | Multi-serial-port expansion board used for CPCI system |
| CN107404731A (en) * | 2016-05-20 | 2017-11-28 | 佛山市顺德区美的电热电器制造有限公司 | The test system and method for testing of wireless communication module |
| CN111856522A (en) * | 2020-06-24 | 2020-10-30 | 深圳航天东方红海特卫星有限公司 | High-speed serial port power supply integrated tester for microsatellite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110907 |