CN205608716U - Multiunit optical module communication interface switching circuit - Google Patents
Multiunit optical module communication interface switching circuit Download PDFInfo
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- CN205608716U CN205608716U CN201620352765.6U CN201620352765U CN205608716U CN 205608716 U CN205608716 U CN 205608716U CN 201620352765 U CN201620352765 U CN 201620352765U CN 205608716 U CN205608716 U CN 205608716U
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- optical module
- resistor
- main frame
- communication interface
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Abstract
The utility model discloses a multiunit optical module communication interface switching circuit, include: the host computer, the host computer is equipped with the I2C bus, and this I2C bus is equipped with data line SDA and clock line SCL, pull -up resistance, pull -up resistance includes first pull -up resistance and second pull -up resistance, first pull -up resistance one end is connected with power VCC, and the other end is connected with data line SDA, second pull -up resistance one end is connected with power VCC, and the other end is connected with clock line SCL, analog switch, analog switch's input is connected with the clock line SCL of host computer, the multiunit optical module, the multiunit optical module is connected with analog switch's output respectively, the multiunit optical module is connected with data line SDA respectively. This design circuit simple structure, reduce cost realizes the communication between host computer and the multiunit optical module.
Description
Technical field
This utility model relates to optical communication field, particularly a kind of many group optical module communication interface switching circuits.
Background technology
In optical communication equipment, CPU passes through I2C (Inter Integrated Circuit) interface communication with optical module,
In I2C agreement, main frame and all be all connected to same I2C bus from equipment, main frame passes through I2C
Address in message accesses different from equipment.In this example, CPU belongs to main frame, and optical module belongs to from setting
One in Bei.For there being the equipment of multiple optical module, owing to the address of each optical module is fixing and phase
With, CPU, with regard to None-identified some optical module therein, causes communication abnormality.So needing one to change
Enter, switch over, by I2C bus switch to this light when making CPU need to communicate with certain optical module
Module, disconnects the connection of other module, it is ensured that communication is normal.
The way generally used is, additionally increases a controller, FPGA (field programmable device) or
CPLD (CPLD) or single-chip microcomputer switch over.This method used at present
One is to need to increase extra controller, and cost is the highest, and two is to also need to additionally compile controller
Journey, adds complexity and the difficulty of realization.
Utility model content
This utility model provides much a kind of group optical module communication interface switching circuits, connects solving existing communication
Mouth switching circuit is complicated, the shortcoming that cost is high, it is achieved the communication between main frame and multiple optical module.
The concrete technical scheme that this utility model is used is:
A kind of many group optical module communication interface switching circuits, including:
Main frame, described main frame is provided with I2C bus, and this I2C bus is provided with data wire SDA and clock line SCL；
Pull-up resistor, described pull-up resistor includes the first pull-up resistor and the second pull-up resistor, described first
Pull-up resistor one end is connected with power supply VCC, and the other end is connected with data wire SDA, described second pull-up electricity
Resistance one end is connected with power supply VCC, and the other end is connected with clock line SCL；
Analog switch, the input of described analog switch is connected with the clock line SCL of main frame；
Organizing optical module, described many group optical modules are connected with the outfan of analog switch respectively, described many groups more
Optical module is connected with data wire SDA respectively, and many group optical modules select port to be connected with main frame by output.
Further, also including multiple GPIO, GIPO draws from main frame, and described GIPO opens with simulation
Close and connect.
Further, described first pull-up resistor size is 4.7K, and the second pull-up resistor size is 4.7K.
Further, described many group optical modules have 2NIndividual, corresponding GPIO and output select port to have
N number of, outfan has 2NIndividual.
Advantageous Effects produced by this utility model is:
First, by this scheme so that communicate between main frame energy with multiple optical modules, simplify soft or hard
Part designs, and reduces cost；
Second, this scheme can be extended according to different optical module quantity, and practicality and versatility are relatively
By force.
Accompanying drawing explanation
Fig. 1: the modular structure schematic diagram of this utility model many groups optical module communication interface switching circuit.
Detailed description of the invention
Below with reference to drawings and Examples, this utility model is described further, but should not come with this
Limit protection domain of the present utility model.
For convenience of explanation and understand the orientation that the technical solution of the utility model, following description are used
The orientation that word is all shown with accompanying drawing is as the criterion.
Embodiment one
Refer to shown in Fig. 1, a kind of many group optical module communication interface switching circuits, including main frame, simulation
Switch, many group optical modules and two pull-up resistors, it is preferred that many group optical modules have 8 groups.
Main frame is provided with I2C bus, and this I2C bus is provided with data wire SDA and clock line SCL, main frame
Data wire SDA is connected with multiple optical modules, and clock line SCL is connected with the input of analog switch, additionally leads
The I2C bus of machine respectively connects a pull-up resistor, and this pull-up resistor includes the first pull-up resistor and the second pull-up electricity
Resistance, first pull-up resistor one end is connected with power supply VCC, and the other end is connected with data wire SDA, on second
Pull-up resistor one end is connected with power supply VCC, and the first pull-up resistor and the second pull-up resistor size are 4.7K；
The other end is connected with clock line SCL；The input of analog switch is connected with the clock line SCL of main frame；8
Group optical module is connected with the outfan of analog switch respectively, and 8 groups of optical modules are connected with data wire SDA respectively；
Also including multiple GPIO, GPIO is connected with analog switch and main frame respectively, and analog switch is (logical with GPIO
With input/output) connect.
Realizing principle, GPIO signal is by having 8 optical modules, analog switch in software control, such as this example
Just select the analog switch of 1 with 8, output selects signal to be accomplished by 3, connects 3 GPIO, works as main frame
Need when communicate with first optical module, 3 GPIO outputs 000, the first via of analog switch export and
Input is connected, and such main frame just can communicate with first optical module, although other optical module data
Line is connected with main frame, but owing to clock line is not switched on, so first will not interfered with main-machine communication
Communication between optical mode and main frame.Same, when main frame needs to communicate with second optical module, GPIO
Output 001, such main frame just can communicate with second optical module.When main frame GPIO successively
During output 010,011,100,101,110,111, main frame just can successively together the 3rd, 4,5,6,7,
8 module communications.Thus achieve the communication between main frame and multiple module.
This example is the situation of 8 optical modules, when having 2NWhen individual optical module needs with main-machine communication, only need
To change 8 path analoging switch in this example into 2NPath analoging switch, uses N number of GPIO of main frame.
It is an object of the invention to provide the optical module communication interface switching circuit of a kind of simple low cost, real
Existing communication between main frame and multiple optical module, generally speaking, this design is simple, cost-effective, user
Just.
The implication of " inside and outside " described herein refers to relative to equipment itself, and sensing sets
Standby internal direction is interior, otherwise is outward.
The implication of " connection " described herein can be being directly connected between parts can also be portion
Being indirectly connected with by other parts between part.
The announcement of book and teaching according to the above description, this utility model those skilled in the art can also be right
Above-mentioned embodiment changes and revises.Therefore, this utility model is not limited to be disclosed above and describe
Detailed description of the invention, should also be as falling into power of the present utility model to modifications and changes more of the present utility model
In the protection domain that profit requires.Although additionally, this specification employs some specific terms, but these
Term merely for convenience of description, does not constitute any restriction to this utility model.
Claims (4)
1. organize optical module communication interface switching circuit one kind, it is characterised in that include more:
Main frame, described main frame is provided with I2C bus, and this I2C bus is provided with data wire SDA and clock line SCL；
Pull-up resistor, described pull-up resistor includes the first pull-up resistor and the second pull-up resistor, on described first
Pull-up resistor one end is connected with power supply VCC, and the other end is connected with data wire SDA, described second pull-up resistor
One end is connected with power supply VCC, and the other end is connected with clock line SCL；
Analog switch, the input of described analog switch is connected with the clock line SCL of main frame；
Organizing optical module, described many group optical modules are connected with the outfan of analog switch respectively more, described more organize light.
Module is connected with data wire SDA respectively, and many group optical modules select port to be connected with main frame by output.
Organizing optical module communication interface switching circuit one the most according to claim 1, its feature exists more
In: also including multiple GPIO, GIPO draws from main frame, and described GIPO is connected with analog switch.
Organizing optical module communication interface switching circuit one the most according to claim 1, its feature exists more
In: described first pull-up resistor size is 4.7K, and the second pull-up resistor size is 4.7K.
Organizing optical module communication interface switching circuit one the most according to claim 1, its feature exists more
In: described many group optical modules have 2NIndividual, corresponding GPIO and output select port to have N number of, outfan
Have 2NIndividual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352765.6U CN205608716U (en) | 2016-04-25 | 2016-04-25 | Multiunit optical module communication interface switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352765.6U CN205608716U (en) | 2016-04-25 | 2016-04-25 | Multiunit optical module communication interface switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205608716U true CN205608716U (en) | 2016-09-28 |
Family
ID=56970340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201620352765.6U Active CN205608716U (en) | 2016-04-25 | 2016-04-25 | Multiunit optical module communication interface switching circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294594A (en) * | 2017-07-03 | 2017-10-24 | 博为科技有限公司 | A kind of passive optical network equipment, switching method and system |
| CN113630186A (en) * | 2021-09-15 | 2021-11-09 | 青岛海信宽带多媒体技术有限公司 | Optical module and communication method |
-
2016
- 2016-04-25 CN CN201620352765.6U patent/CN205608716U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294594A (en) * | 2017-07-03 | 2017-10-24 | 博为科技有限公司 | A kind of passive optical network equipment, switching method and system |
| CN107294594B (en) * | 2017-07-03 | 2023-11-14 | 博为科技有限公司 | Passive optical network device, switching method and system |
| CN113630186A (en) * | 2021-09-15 | 2021-11-09 | 青岛海信宽带多媒体技术有限公司 | Optical module and communication method |
| CN113630186B (en) * | 2021-09-15 | 2022-09-16 | 青岛海信宽带多媒体技术有限公司 | Optical module and communication method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: SHENZHEN CHIMA COMMUNICATION TECHNOLOGY Co.,Ltd. Document name: Notification of Passing Examination on Formalities |