CN203858630U

CN203858630U - Pcie interface switching device

Info

Publication number: CN203858630U
Application number: CN201420253908.9U
Authority: CN
Inventors: 邹国彦
Original assignee: Kunda Computer Technology Kunshan Co Ltd; Mitac International Corp
Current assignee: Kunda Computer Technology Kunshan Co Ltd; Mitac International Corp
Priority date: 2014-05-16
Filing date: 2014-05-16
Publication date: 2014-10-01
Anticipated expiration: 2024-05-16

Abstract

The utility model discloses a PCIE interface switching device comprising a PCIE-SSD control unit, a main board A, a main board B and a PCIE interface selecting unit. The main board A is provided with a first PCIE interface and a second PCIE interface, the main board B is provided with a third PCIE interface, and the PCIE-SSD control unit is provided with two interfaces; one interface is connected to the first PCIE interface to implement transmission of data instructions between the PCIE-SSD control unit and the main board A; the other interfaces is connected to the second PCIE interface and the third PCIE interface through the PCIE interface selecting unit in a switched manner so as to implement the change of the bandwidth during the transmission between the PCIE-SSD control unit and the main boards.

Description

PCIE interface change-over device

Technical field

The utility model relates to interface conversion and receives field, relates in particular to a kind of PCIE interface change-over device.

Background technology

SSD=solid state disk, it is solid state hard disc, the hard disk made from solid-state electronic storage chip array, be widely used in the fields such as military, vehicle-mounted, industry control, video monitoring, network monitoring, the network terminal, electric power, medical treatment, aviation, navigator, there is not disk drive magnetic head in solid state hard disc, controller chip is grasped the memory location of data in advance, can directly carry out access data by electric signal, and data read faster.

Along with the development of computing machine and the communication technology, input and output (I/O) interface of a new generation emerges in multitude, and makes Peripheral Component Interconnect standard (PCI) bus bandwidth cannot tackle the powerful high bandwidth concurrent reading and concurrent writing requirement of inside computer system.The lifting of PCI bus system performance has run into bottleneck, has occurred thus the high speed peripheral component interlinkage standard (PCI Express also claims PCIE bus) of higher development.As current up-to-date bus and interface standard, PCI Express bus adopts point-to-point connected in series, and high bandwidth can be provided.According to bus bit wide difference, also difference to some extent of the interface of PCI Express, comprises X1, X2, X4, X8, X16 and X32, and PCIE specification is connected to 32 passages from 1 passage and connects, there is very strong retractility, to meet the different demand of different system equipment to data transfer bandwidth.

One mainboard that is provided with PCIE interface is carrying out in data and instruction output with the SSD that has PCIE interface, if the interface of SSD is PCIEx4, generally that PCIEx4 single face uses at server end, storage is that PCIEx2 two group interfaces are connected to 2 mainboards, two groups of PCIE of storage are the runnings of x2 interface, when the PCIE of one end wherein decommission or mainboard to do that heat inserts be also not affect another group normal operation, to avoid affecting system, SSD is stored; When but existing framework storage is connected to a mainboard, the mainboard that has PCIE interface also can only be done serial connection with x2 interface, transmission bandwidth is less, how PCIE interface is changed, while making a mainboard, also can be connected in series to promote double transmission bandwidth with x4 interface, when 2 mainboard, then switch x2 interface and do serial connection.

Summary of the invention

Fundamental purpose of the present utility model is to provide a kind of PCIE interface change-over device, and the PCIE bus transfer of 2 passages is selected to a wherein passage, when a mainboard, can be connected in series to promote double transmission bandwidth with x4 interface, when 2 mainboard, then switches x2 interface and does serial connection.

In order to achieve the above object, the utility model provides a kind of PCIE interface change-over device, comprising:

Mainboard A, it is provided with a PCIE interface and the 2nd PCIE interface;

Mainboard B, as redundant mainboard, it is provided with the 3rd PCIE interface;

PCIE interface selected cell, connects respectively the 2nd PCIE interface and PCIE interface, switches and is connected as required with the 2nd PCIE interface with the 3rd PCIE interface;

PCIE-SSD control module, it is provided with two group interfaces, one group interface is directly connected with mainboard A by a PCIE interface, another group interface is realized and being connected with the switching of the 2nd PCIE interface and the 3rd PCIE interface by PCIE interface selected cell, realizes the change of transmission bandwidth between PCIE-SSD control module and mainboard.

Especially, described PCIE interface selected cell comprises PCIE MUX Switch and controls switch unit, and PCIE MUX Switch is controlled to switching, makes PCIE MUX Switch switch and be connected with the 2nd PCIE interface and the 3rd PCIE interface.

Especially, described control switch unit comprises control piece, d type flip flop and clock circuit thereof, and described control piece connects d type flip flop as input control, and described clock circuit provides clock signal for d type flip flop.

Especially, described clock circuit comprises:

First with door, its one end is electrically connected described mainboard A, the other end is electrically connected described mainboard B;

Or door, its one end is electrically connected described mainboard A, and the other end is electrically connected described mainboard B;

Second with door, described first with door and or the output terminal of door be connected respectively described second with two input ends of door, described second with output terminal be electrically connected the pulse signal end of described d type flip flop;

Especially, described control piece is button or switch.

Compared with prior art, the advantage of the utility model PCIE interface change-over device is, the 2nd PCIE interface is selected to be connected with the 3rd PCIE interface with PCIE MUX Switch, in the time only having a mainboard, utilize PCIE MUX Switch to select to be connected with the 2nd PCIE interface, make mainboard A be connected in series to promote double transmission bandwidth with x4 interface, when two mainboards, recycling PCIE MUX Switch switches connection, and mainboard A and mainboard B do serial connection with PCIE x2 interface respectively.

[brief description of the drawings]

Fig. 1 is the theory structure schematic diagram of the utility model PCIE interface change-over device.

Fig. 2 is the physical circuit connection diagram of the utility model PCIE interface change-over device.

Fig. 3 is the truth table of d type flip flop in the utility model PCIE interface change-over device.

[embodiment]

Refer to shown in Fig. 1, the utility model PCIE interface change-over device, comprises mainboard A 1, which is provided with a PCIE interface 3 and the second interface 7; Mainboard B 2, which is provided with the 3rd PCIE interface 4; PCIE interface selected cell 5 and PCIE-SSD control module 6.Described mainboard B is redundant mainboard, and described PCIE-SSD control module 6 is provided with two group interfaces, and one group interface is directly connected with a PCIE interface 3 of mainboard A1, realizes data and command between PCIE-SSD control module 6 and mainboard A 1.Another group interface is switched and is connected with the 3rd PCIE interface 4 on the 2nd PCIE interface 7 and mainboard B 2 on mainboard A 1 by described PCIE interface selected cell 5, when redundant mainboard B 2 exists, PCIE interface selected cell 5 switches to the 3rd PCIE interface 4 on mainboard B 2 and is connected, now, mainboard A 1 carries out the transmission of data and instruction with bandwidth by a PCIE interface 3 and PCIE-SSD control module 6, mainboard B 2 transmits with bandwidth with PCIE-SSD control module 6 by the 3rd PCIE interface 4.In the time that mainboard B 2 does not exist, described PCIE interface selected cell 5 switches to the 2nd PCIE interface 7 on mainboard A 1 and is connected, and mainboard A 1 carries out respectively the transmission of data and instruction with bandwidth by a PCIE interface 3 and the 2nd PCIE interface 7.

Be illustrated in figure 2 a specific embodiment of the utility model PCIE interface change-over device, the change of transmission bandwidth when described PCIE interface change-over device is realized PCIE-SSD control module 6 and a mainboard or two mainboards and carried out data and command by PCIE interface selected cell 5.In the present embodiment, described PCIE interface selected cell 5 comprises PCIE MUX Switch 51 and d type flip flop 52, control piece and clock circuit 54.Described control piece is switch or button 53, connect described d type flip flop 52 as input signal, in the present embodiment, adopt button 53, described clock circuit 54 provides clock signal for d type flip flop 52, the output signal of described d type flip flop 52 is switched as the control of PCIE MUX Switch 51, controls PCIE MUX Switch 51 and is connected with the 2nd PCIE interface 7 on mainboard A 1 or is connected with the 3rd PCIE interface 4 on mainboard B 2.

The present embodiment in use, if PCIE-SSD control module 6 is provided with 2 groups of PCIEx2 interfaces, when redundant mainboard B 2 exists, mainboard A 1 is the group interface with x2 passage serial connection PCIE-SSD control module 6 by a PCIE interface 3, now button 53 is failure to actuate, the D pin of d type flip flop 52 is now high level, as shown in Figure 3, now, d type flip flop 52 is exported a high level, after receiving this high level, triggers the SEL pin of PCIE MUX Switch 51, select to connect the 3rd PCIE interface 4, be that mainboard B 2 is by another group interface of PCIE x2 passage serial connection PCIE-SSD control module 6.When redundant mainboard B 2 does not exist, the for a change transmission bandwidth of PCIE, pressing keys 53, give d type flip flop 52 1 low levels, now, d type flip flop 52 is exported the SEL pin of a low level to PCIE MUX Switch 51, PCIE MUX Switch 51 triggers and carries out passage switching, select to connect the 2nd PCIE interface 7, now, PCIE-SSD control module 6 transmits with PCIE x2 bandwidth by a PCIE interface 3 and the 2nd PCIE interface 7 respectively, and mainboard A 1 is by PCIE x4 serial connection PCIE-SSD control module 6.

In the present embodiment, described clock circuit 54 comprise first with door, second with door and one or, wherein, the one one is connected mainboard A 1, the second input end with the first input end of door connects mainboard B 2, or two input ends of door connect respectively mainboard A 1 and mainboard B 2, described first with the output terminal of door and or the output terminal of door be connected respectively second with the input end of door, second with output terminal be connected the clock signal terminal of d type flip flop 52.

The above; it is only embodiment of the present utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims

1. a PCIE interface change-over device, is characterized in that, comprising:

Mainboard A, it is provided with a PCIE interface and the 2nd PCIE interface;

PCIE-SSD control module, it is provided with two group interfaces, one group interface is directly connected with mainboard A by a PCIE interface, another group interface is switched and is connected with the 2nd PCIE interface and the 3rd PCIE interface by PCIE interface selected cell, realizes the change of transmission bandwidth between PCIE-SSD control module and mainboard.

2. PCIE interface change-over device according to claim 1, it is characterized in that, described PCIE interface selected cell comprises PCIE MUX Switch and controls switch unit, PCIE MUX Switch is controlled to switching, make PCIE MUX Switch switch and be connected with the 2nd PCIE interface and the 3rd PCIE interface.

3. PCIE interface change-over device according to claim 2, it is characterized in that, described control switch unit comprises control piece, d type flip flop and clock circuit thereof, and described control piece connects d type flip flop as input control, and described clock circuit provides clock signal for d type flip flop.

4. PCIE interface change-over device according to claim 3, is characterized in that, described clock circuit comprises:

Second with door, described first with door and or the output terminal of door be connected respectively described second with two input ends of door, described second with output terminal be electrically connected the pulse signal end of described d type flip flop.

5. PCIE interface change-over device according to claim 3, is characterized in that, described control piece is button or switch.