CN206893961U - A kind of USB turns AccessPort line - Google Patents
A kind of USB turns AccessPort line Download PDFInfo
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- CN206893961U CN206893961U CN201720416607.7U CN201720416607U CN206893961U CN 206893961 U CN206893961 U CN 206893961U CN 201720416607 U CN201720416607 U CN 201720416607U CN 206893961 U CN206893961 U CN 206893961U
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- pin
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- accessport
- analog switch
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- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 108010028984 3-isopropylmalate dehydratase Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004171 remote diagnosis Methods 0.000 description 1
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Abstract
The utility model provides a kind of USB and turns AccessPort line, it includes analog switch chip, RX lead ends, TX lead ends and switch control module, the analog switch chip includes B1 pins, B2 pins, GND pin, VCC pin, S pins and A pins, the A pins electrically connect with RX lead ends, TX lead ends, the S pins electrically connect with switch control module, the VCC pin and power electric connection, the GND pin ground connection, the UAR connector of the B1 pins, B2 pins with being inserted into mainboard pin are electrically connected.Using the technical solution of the utility model, the circuit for turning the chip of Serial Port Line for existing USB is improved, and is increased analog switch chip and switch control module newly, chip Auto-Sensing is realized by both cooperations, so as to realize adaptive RX and TX interfaces.
Description
Technical field
A kind of computer fittings are the utility model is related to, more particularly to a kind of USB turns AccessPort line.
Background technology
We carry out BMC debugging now（Either pass through serial ports burning BMC FW）It is by a USB to Serial
（USB turns serial ports）Line is connected to 2 pin and 3 pin on the UART connector of mainboard, and it is USB to Serial respectively
The BMC RX of line（Receive, receive）With BMC TX（Transfer, transmission）Corresponded with it.When we require connect to
When mainboard carries out debug, intuitively we can not distinguish on earth which be RX, which is TX again, often by RX and TX wrong plugs,
Mutually put again again afterwards and can be only achieved purpose, it is sometimes because anti-inserted, or even this root debugging line can be burnt out.And this Debug
Cable is easier to be lost, it would be desirable to a kind of new USB to Serial lines is designed to avoid such situation, so as to real
Now adaptive RX and TX interfaces.
Utility model content
For above technical problem, the utility model discloses a kind of USB to turn AccessPort line, solves prior art
It is anti-inserted and can burn out this root debugging line the problem of.
On the other hand, the technical solution of the utility model is：
A kind of USB turns AccessPort line, and it includes analog switch chip, RX lead ends, TX lead ends and switch control mould
Block, the analog switch chip include B1 pins, B2 pins, GND pin, VCC pin, S pins and A pins, the A pins with
RX lead ends, the electrical connection of TX lead ends, the S pins electrically connect with switch control module, and the VCC pin is electrically connected with power supply
Connect, the GND pin ground connection, the UAR connector of the B1 pins, B2 pins with being inserted into mainboard pin is electrically connected.
Using this technical scheme, by the UAR connector's of the B1 pins of analog switch chip, B2 pins and mainboard
Pin is electrically connected, and analog switch chip is connected by S pins with switch control module, is started working, internal circuit is A Working moulds
Formula, i.e. default mode, that is, assume the UART connector that its internal circuit will be inserted into us TX and RX
Pin pin just match, can be with normal work, then switch control module is without action；If mismatched, illustrate us by pin
Pin is anti-inserted, and mode of operation is switched to B mode of operations by that switch control module control analog switch chip；It is assumed that its internal electricity
The UART connector that road will be inserted into us TX and RX pin pin will be just on the contrary, B mode of operations namely will
The connection circuit of TX, RX and pin pin connection is turned.
In simple terms, USB is turned into AccessPort line to be inserted on mainboard UAR connector pin pin, switch control
Module judges whether normal work, if energy normal work, as under default mode, TX and UAR connector 2 pin connect
Connect, RX is connected with UAR connector 3pin；If cisco unity malfunction, TX and UAR connector 2 pin connect
Connect, RX is connected with UAR connector 3pin, then the connection circuit hair in switch control module control analog switch chip
Life is turned, and TX is connected with UAR connector 2 pin, RX is connected with UAR connector 3pin.
Wherein, the switch control module can be a control module, wherein comprising program, judge whether to need to mould
The internal circuit for intending switch is changed.
As further improvement of the utility model, the analog switch chip is single pole double throw analog switch chip.
As further improvement of the utility model, the model of the analog switch chip includes but is not limited to
SN74LVC1G3157DCKR。
As further improvement of the utility model, the power supply is 3.3V.
As further improvement of the utility model, it includes the first pin and second pin that insert mainboard, the B1
Pin electrically connects with first pin, and the B2 pins electrically connect with the second pin, first pin, second pin
It is connected with the pin of the UAR connector with insertion mainboard.
Compared with prior art, the beneficial effects of the utility model are：
Using the technical solution of the utility model, the circuit for turning the chip of Serial Port Line for existing USB is improved,
Newly-increased analog switch chip and switch control module, chip Auto-Sensing is realized by both cooperations, adaptive so as to realize
RX and TX interfaces.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of circuit connection structure of embodiment of the utility model.
Embodiment
Below in conjunction with the accompanying drawings, preferably embodiment of the present utility model is described in further detail.
As shown in figure 1, a kind of USB turns AccessPort line, it include analog switch chip, RX lead ends, TX lead ends and
Switch control module, the analog switch chip include B1 pins, B2 pins, GND pin, VCC pin, S pins and A pins,
The A pins electrically connect with RX lead ends, TX lead ends, and the S pins electrically connect with switch control module, the VCC pin
With 3.3V power electric connections, the GND pin ground connection, the B1 pins, B2 pins and the UAR connector for being inserted into mainboard
Pin electrical connection, the model SN74LVC1G3157DCKR of the analog switch chip.
The USB turn AccessPort line include insertion mainboard the first pin and second pin, the B1 pins with it is described
First pin electrically connects, and the B2 pins electrically connect with the second pin, and first pin, second pin with insertion with leading
The UAR connector of plate pin connections.
It is inserted into use, USB is turned into AccessPort line on mainboard UAR connector pin pin, switch control mould
Block judges whether normal work, if energy normal work, as under default mode, TX and UAR connector 2 pin connect
Connect, RX is connected with UAR connector 3pin；If cisco unity malfunction, TX and UAR connector 2 pin connect
Connect, RX is connected with UAR connector 3pin, then the connection circuit hair in switch control module control analog switch chip
Life is turned, and TX is connected with UAR connector 2 pin, RX is connected with UAR connector 3pin.
English abbreviation involved by the utility model is explained as follows：
BMC：Baseboard management controller（Baseboard Management Controller）.Typically it is built on mainboard,
Support the IPMI specifications of professional standard.The function that BMC is provided includes：Local and remote diagnosis, console are supported, configuration pipe
Reason, hardware management and failture evacuation.
USB：USB（Universal Serial Bus）, it is an external bus standard, for specification electricity
Brain and external equipment are connected and communicate with.It is to apply the interfacing in PC fields.The plug and play of USB interface holding equipment and
Warm connection function.
UART：Universal asynchronous receiving-transmitting transmitter（Universal Asynchronous Receiver/Transmitter),
Commonly referred to as UART, it is a kind of asynchronous receiving-transmitting transmitter, is a part for computer hardware.Data is led to by serial communication with parallel
Make transmission conversion between letter, as parallel input as the chip of Serial output, be typically integrated into the link of other communication interfaces.
Embodiment described above is better embodiment of the present utility model, and it is new not to limit this practicality with this
The specific implementation scope of type, the scope of the utility model includes being not limited to present embodiment, all according to the utility model
Shape, the equivalence changes made of structure are in the scope of protection of the utility model.
Claims (5)
1. a kind of USB turns AccessPort line, it is characterised in that：It include analog switch chip, RX lead ends, TX lead ends and
Switch control module, the analog switch chip include B1 pins, B2 pins, GND pin, VCC pin, S pins and A pins,
The A pins electrically connect with RX lead ends, TX lead ends, and the S pins electrically connect with switch control module, the VCC pin
With power electric connection, the GND pin is grounded, the UAR connector of the B1 pins, B2 pins with being inserted into mainboard
Pin is electrically connected.
2. USB according to claim 1 turns AccessPort line, it is characterised in that：The analog switch chip is that hilted broadsword is double
Throw analog switch chip.
3. USB according to claim 2 turns AccessPort line, it is characterised in that：The model of the analog switch chip
SN74LVC1G3157DCKR。
4. USB according to claim 3 turns AccessPort line, it is characterised in that：The power supply is 3.3V.
5. USB according to claim 3 turns AccessPort line, it is characterised in that：It includes the first pin for inserting mainboard
And second pin, the B1 pins electrically connect with first pin, the B2 pins electrically connect with the second pin, described
First pin, second pin are connected with the pin of the UAR connector with insertion mainboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720416607.7U CN206893961U (en) | 2017-04-19 | 2017-04-19 | A kind of USB turns AccessPort line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720416607.7U CN206893961U (en) | 2017-04-19 | 2017-04-19 | A kind of USB turns AccessPort line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206893961U true CN206893961U (en) | 2018-01-16 |
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ID=61324337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720416607.7U Active CN206893961U (en) | 2017-04-19 | 2017-04-19 | A kind of USB turns AccessPort line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206893961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109800203A (en) * | 2019-01-25 | 2019-05-24 | 山东超越数控电子股份有限公司 | A kind of RS232 serial ports RXD and TXD automatic switch-over circuit and its switching method |
-
2017
- 2017-04-19 CN CN201720416607.7U patent/CN206893961U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109800203A (en) * | 2019-01-25 | 2019-05-24 | 山东超越数控电子股份有限公司 | A kind of RS232 serial ports RXD and TXD automatic switch-over circuit and its switching method |
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