CN107133429A - A kind of onboard network transmission system and its design method - Google Patents
A kind of onboard network transmission system and its design method Download PDFInfo
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- CN107133429A CN107133429A CN201710434425.7A CN201710434425A CN107133429A CN 107133429 A CN107133429 A CN 107133429A CN 201710434425 A CN201710434425 A CN 201710434425A CN 107133429 A CN107133429 A CN 107133429A
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- signal connector
- port signal
- marvell
- optical port
- power port
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4009—Coupling between buses with data restructuring
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Abstract
The invention provides a kind of onboard network transmission system and its design method, the system includes CPU, optical port signal connector, power port signal connector, EEPROM, PHY chip Marvell 3220, and PHY chip and CPU network master control IC are connected by KR buses；Connected between PHY chip and optical port signal connector by TX/RX buses；Connected between PHY chip and power port signal connector by MDI buses.This method comprises the following steps：Setting network controls the position of IC, Marvell 3220, optical port signal connector, power port signal connector on pcb board；Pin annexation is set；Connect up and connect according to annexation schematic diagram.The present invention realizes that same pcb board same position both can support optical port to support power port, it is not necessary to use outer plug-in card, saves in cost, mechanism without independent headspace again, it is to avoid the waste in space.
Description
Technical field
The invention mainly relates to network transmission link, more particularly to a kind of onboard network transmission system and its design method.
Background technology
Currently used for the interface of network transmission, it is divided into power port (being represented with " RJ45 ") and optical port (with " SFP+ " come table
Show), different clients are different to the demand of optical port and power port, and both can't be substituted.It is either universal at present
Server or whole machine cabinet server, both forms all coexist.
If desired optical port can be supported to support power port again, be realized mostly using outer plug-in card.Major technique is in master
Plate reserve a neck, it is necessary to support power port just on neck the network interface card of electricity jack, it is necessary to support the network interface card of optical port just slotting optical port.
But outer plug-in card takes up space in mechanism design, cost is also high.
Also a solution is using while the network PHY chip of support optical port and power port, separately puts on pcb board
Put, this mode does not only take up PCB space, increase cost, the windowing space of mechanism is also taken in addition, the wave in space is caused
Take.
The content of the invention
In order to solve the above problems, the invention provides a kind of onboard network transmission system and its design method, utilize
The PHY chips of Marvell 3220 devise the location layout of optical port and power port again as transfer chip, so as to realize same
One pcb board same position both can support optical port to support power port, it is not necessary to use outer plug-in card, save cost, machine
Without independent headspace again on structure, it is to avoid the waste in space.
The present invention uses following technical scheme：
A kind of onboard network transmission system, including CPU, optical port signal connector, power port signal connector, EEPROM, its
It is characterised by, in addition to PHY chip Marvell 3220, chip Marvell 3220 and CPU network master control IC total by KR
Line is connected；Connected between chip Marvell 3220 and optical port signal connector by TX/RX buses；Chip Marvell 3220
It is connected between power port signal connector by MDI buses；Chip Marvell 3220 is electrically connected with EEPROM.
Further, the SIP that network master control IC KR_TX pins meet chip Marvell 3220 by an electric capacity is inputted
End, an electric capacity is provided between chip Marvell 3220 SOP output ends and network master control IC KR_RX pins.
It is preferred that, the electric capacity selects 0.1uf electric capacity.
Further, chip Marvell 3220 SIP inputs are inputted by a capacitance connection optical port signal connector
Pin, chip Marvell 3220 SOP output ends connect optical port signal connector output pin, optical port signal by a resistance
Connector GND pin is grounded.
A kind of design method of onboard network transmission system, it is characterised in that described method comprises the following steps：
Step 1：Setting network control IC, Marvell 3220, optical port signal connector, power port signal connector are in PCB
Position on plate；
Step 2：Optical port signal connector, the pin annexation of power port signal connector are set；
Step 3：According to annexation schematic diagram connection network control IC, Marvell 3220, optical port signal connector, electricity
Mouth signal connector.
Further, in step 1, first, network control IC and Marvell 3220 is arranged on to the centre of pcb board；Its
It is secondary, optical port signal connector, power port signal connector are divided into two groups, each group includes an optical port signal connector and one
Power port signal connector；3rd, the power port connector in each group is arranged on to the edge of pcb board, same group of optical port signal
Connector is inside pcb board.
Further, in step 2, the annexation set-up mode of pin is：
1) signal pin of power port signal connector and optical port signal connector staggers and put in same group；
2) GND for being connected the GND of power port signal connector and optical port signal connector radome is shared；
3) the pin position 20 of the radome of optical port signal connector is set to sky.
Further, in step 3, the circuit for controlling to design between IC, Marvell 3220, optical port, power port according to network
Principle, controls IC, Marvell 3220, optical port, the remaining pin of power port to be attached according to normal wiring on network.
The beneficial effects of the invention are as follows：
1st, realize that same pcb board card both can support optical port to support power port, meet the demand of different clients, save
Save and exploited natural resources, cost is reduced than purchase extrapolation network interface card.
2nd, by being designed for optical port and power port Position Design and pin, onboard optical port and power port shared one are not only realized
Individual mechanism design, reduces the exploitation of mechanism mould, saves cost, and reduces PCB size requirement, so as to save
PCB cost.
Brief description of the drawings
Fig. 1 is the structure principle chart of present system；
Fig. 2 is the line graph of network master control IC and PHY in present system；
Fig. 3 is network PHY and the line graph of optical port and power port in present system；
Fig. 4 is the flow chart of design method of the present invention；
Fig. 5 is PHY and optical port and the position setting of power port and actual line design sketch；
Fig. 6 is the design principle figure of power port signal connector pin；
Fig. 7 is the design principle figure of optical port signal connector radome pin.
Embodiment
In order that those skilled in the art better understood when, the present invention be realized, below by specific embodiment pair
The present invention is described in detail.
A kind of onboard network transmission system as shown in Figure 1, including the connection of CPU, optical port signal connector, power port signal
Device, EEPROM, PHY chip Marvell 3220, chip Marvell 3220 and CPU network master control IC are connected by KR buses
Connect；Connected between chip Marvell 3220 and optical port signal connector by TX/RX buses；Chip Marvell 3220 and electricity
Connected between mouth signal connector by MDI buses；Chip Marvell 3220 is electrically connected with EEPROM.
As shown in Fig. 2 having two-way input and output, network master control IC KR_ between network master control IC and Marvell 3220
TX pins connect chip Marvell 3220 SIP inputs, chip Marvell 3220 SOP by 0.1uf electric capacity
0.1uf electric capacity is also equipped between output end and network master control IC KR_RX pins.
As shown in figure 3, optical port signal connector has two-way input and output, chip Marvell with chip Marvell 3220
3220 SIP inputs are exported by a capacitance connection optical port signal connector input pin, chip Marvell 3220 SOP
End connects optical port signal connector output pin, optical port signal connector GND pin ground connection by a resistance.Power port signal is connected
Device also has two-way input and output with chip Marvell 3220, is connected respectively to chip Marvell 3,220 two MDI modules
On.
As shown in figure 4, the application also proposed a kind of design method of onboard network transmission system, described method includes
Following steps：
Step 1：Setting network control IC, Marvell 3220, optical port signal connector, power port signal connector are in PCB
Position on plate.The thinking specifically set is：First, network control IC and Marvell3220 is arranged on to the centre of pcb board；
Secondly, optical port signal connector, power port signal connector are divided into two groups, each group includes an optical port signal connector and one
Individual power port signal connector；3rd, the power port connector in each group is arranged on to the edge of pcb board, same group of optical port letter
Number connector is inside pcb board, and it is as shown in Figure 5 that particular location puts relation.
Step 1 set principle be：The connector of optical port is divided into two parts, and a part is signaling interface, another part
It is metal cap.Therefore, whole optical port connector is long, and the connector RJ45 of power port is shorter than optical port connector and wide.Will
Want the two interfaces carrying out CO-LAY, convenient plug network cable lines, reduce space waste, take the connector of optical port again
With the connector of power port in the same horizontal line, optical port signal connector is inside plank, and power port connector is close to edges of boards.
Step 2：Optical port signal connector, the pin annexation of power port signal connector are set.Detailed process is：
1) signal pin of power port signal connector and optical port signal connector staggers and put in same group；
2) GND for being connected the GND of power port signal connector and optical port signal connector radome is shared；
3) the pin position 20 of the radome of optical port signal connector is set to sky.
The whole design idea of step 2 is：
In order to save space, by two CO-LAY interface, stagger before and after signal section and put.When putting, it is found that：
The 18 and RJ45 of pin position of SFP+ radome pin position G1 is interfered with each other, the 20 and RJ45 of pin position of SFP+ radome pin position 19
By too near, the risk of short circuit is had during welding.
The 18 and RJ45 of pin position of optical port radome pin position G1 interferes with each other Resolving probiems：
The GND that the two pin position current RJ45 by analysis G1 pin position is RJ45, and the radome of optical port is dry for shielding
Disturb to need its all pin position connecing GND points of independent GND and system and open, to carry out CO-LAY by RJ45 GND and optical port
The GND that is connected of radome share.Optical port radome pin position 18 and RJ45G1 pin position shares a welding on pcb board card
Hole.The problem of interference of the two pin position can thus be solved, as shown in Figure 6.
The 20 and RJ45 of pin position of the radome of optical port pin position 19 is solved by too near problem：
RJ45 pin position 19 is LED control signal, and the pin position 20 of radome is GND, once this pin position short circuit, RJ45
LED light will not work.This problem can't resolve by position movement at present, the risk for also just saying short circuit is can not
Eliminate.To solve this problem, the pin position 20 of the radome of optical port is set to sky, GND and other signals are not reconnected.
Accordingly even when short circuit nor affects on RJ45 LED function, as shown in Figure 7.
Step 3：The circuit theory for controlling to design between IC, Marvell 3220, optical port, power port according to network, by network
Control IC, Marvell 3220, optical port, the remaining pin of power port are attached according to normal wiring.
Although specification and drawings and examples have been carried out detailed description to the invention, this area skill
Art personnel should be appreciated that still can modify or equivalent substitution to the invention；And all do not depart from wound of the present invention
The technical scheme for the spirit and scope made and its improvement, it is encompassed by among the protection domain of the invention patent.
Claims (8)
1. a kind of onboard network transmission system, including CPU, optical port signal connector, power port signal connector, EEPROM, it is special
Levy and be, in addition to PHY chip Marvell 3220, chip Marvell 3220 and CPU network master control IC pass through KR buses
Connection；Connected between chip Marvell 3220 and optical port signal connector by TX/RX buses；Chip Marvell 3220 with
Connected between power port signal connector by MDI buses；Chip Marvell 3220 is electrically connected with EEPROM.
2. a kind of onboard network transmission system according to claim 1, it is characterised in that network master control IC KR_TX draws
Pin connects chip Marvell 3220 SIP inputs, chip Marvell 3220 SOP output ends and network master by an electric capacity
An electric capacity is provided between the KR_RX pins for controlling IC.
3. a kind of onboard network transmission system according to claim 2, it is characterised in that the electric capacity selects 0.1uf
Electric capacity.
4. a kind of onboard network transmission system according to claim 1 or 2, it is characterised in that chip Marvell 3220
SIP inputs by a capacitance connection optical port signal connector input pin, chip Marvell 3220 SOP output ends are led to
Cross resistance connection optical port signal connector output pin, optical port signal connector GND pin ground connection.
5. a kind of design method of onboard network transmission system, it is characterised in that described method comprises the following steps：
Step 1：Setting network control IC, Marvell 3220, optical port signal connector, power port signal connector are on pcb board
Position；
Step 2：Optical port signal connector, the pin annexation of power port signal connector are set；
Step 3：According to annexation schematic diagram connection network control IC, Marvell 3220, optical port signal connector, power port letter
Number connector.
6. the design method of a kind of onboard network transmission system according to claim 5, it is characterised in that in step 1, first
First, network control IC and Marvell 3220 is arranged on to the centre of pcb board；Secondly, by optical port signal connector, power port signal
Connector is divided into two groups, and each group includes an optical port signal connector and a power port signal connector；3rd, by each group
In power port connector be arranged on the edge of pcb board, same group of optical port signal connector is inside pcb board.
7. the design method of a kind of onboard network transmission system according to claim 6, it is characterised in that in step 2, draw
The annexation set-up mode of pin is：
1) signal pin of power port signal connector and optical port signal connector staggers and put in same group；
2) GND for being connected the GND of power port signal connector and optical port signal connector radome is shared；
3) the pin position 20 of optical port signal connector radome is set to sky.
8. the design method of a kind of onboard network transmission system according to claim 7, it is characterised in that in step 3, root
The circuit theory for controlling to design between IC, Marvell 3220, optical port, power port according to network, IC, Marvell are controlled by network
3220th, the remaining pin of optical port, power port is attached according to normal wiring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434425.7A CN107133429A (en) | 2017-06-09 | 2017-06-09 | A kind of onboard network transmission system and its design method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434425.7A CN107133429A (en) | 2017-06-09 | 2017-06-09 | A kind of onboard network transmission system and its design method |
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| Publication Number | Publication Date |
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| CN107133429A true CN107133429A (en) | 2017-09-05 |
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| CN201710434425.7A Pending CN107133429A (en) | 2017-06-09 | 2017-06-09 | A kind of onboard network transmission system and its design method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039939A (en) * | 2021-10-25 | 2022-02-11 | 北京四方继保工程技术有限公司 | Device, FPGA and method for self-adaptive optical-electrical interface |
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Patent Citations (7)
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| US7255488B1 (en) * | 2004-01-15 | 2007-08-14 | Cisco Technology, Inc. | Network element connector assembly including stacked electrical and optical connector interfaces |
| CN1674547A (en) * | 2005-02-20 | 2005-09-28 | 黄炜 | Optical/electric interface module space multiplexing method and apparatus used for Ethernet SFP interface |
| CN101242252A (en) * | 2007-02-08 | 2008-08-13 | 北京天融信网络安全技术有限公司 | Method for realizing dual-link redundancy backup of network device based on Combo interface |
| CN201878148U (en) * | 2010-08-01 | 2011-06-22 | 厦门福信光电集成有限公司 | Photoelectric converter |
| CN203851161U (en) * | 2014-05-23 | 2014-09-24 | 科大智能（合肥）科技有限公司 | FPGA-based protocol converter with aggregation function |
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| CN114039939A (en) * | 2021-10-25 | 2022-02-11 | 北京四方继保工程技术有限公司 | Device, FPGA and method for self-adaptive optical-electrical interface |
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Application publication date: 20170905 |
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