CN204883525U - External switching card - Google Patents

Abstract

The utility model discloses an external adapter card, which belongs to the field of server interconnection equipment. The technical problem to be solved is that when the main board of the server is cascaded with electronic equipment, the wiring is too long and the signal quality is reduced. The card is equipped with a PCIE bus interface, an external MiniSASHD connector, a PCIE ReDriver chip, and an EEPROM chip. The PCIE ReDriver chip is connected to the PCIE bus interface, an external MiniSASHD connector, and an EEPROM chip; Built-in MiniSASHD interface, one end of the PCIE to SASHD conversion circuit is connected to the PCIE ReDriver chip, and the other end is connected to the external MiniSASHD interface.

Description

An external riser card

technical field

The utility model relates to the field of server interconnection equipment, in particular to an external adapter card.

Background technique

With the rapid development of the Internet and cloud computing technology, more and more data needs to be processed in various industries and fields, and it is becoming more and more important. Users have put forward higher requirements for the data processing capability and high-speed data transmission capability of the server system. At the same time, along with PCIESwitch (full English name is Peripheral Component Interconnect Express Switch, Chinese translation is high-speed peripheral component interconnection switch), Chinese translation is high-speed peripheral component interconnection switch), PCIE (English full name is Peripheral Component Interconnect Express, Chinese translation is high-speed peripheral component interconnection) SSD (English full name is Solid State Drive, Chinese translation is Solid State Drive) and other hardware equipment technological breakthroughs, using PCIE bus (PCIE3.0 speed can reach 8Gb/s) to achieve high-speed interconnection of the system has become an urgent problem to be solved.

Among them, in a high-density server system, there is often only one system motherboard, cascading multiple SSDs or Switch (English full name is Switch, Chinese translation is switch) subsystem equipment, especially supporting NVME (English full name is Non-VolatileMemoryExpress, Chinese Translated as fast non-volatile storage) backplane device of SSD, but leads to longer wiring and lower signal quality. At this time, a PCIE transfer device is needed to transfer and cascade the high-quality PCIE signal of the main board of the system to the backplane subsystem.

The Chinese patent with the publication number CN204302886U published on April 29, 2015 proposes an adapter card and electronic equipment, including: a board body; The card connector is used to insert the expansion slot corresponding to the riser card on the motherboard of an electronic device; On the board; PCIE signal transmission circuit, the PCIE signal transmission circuit has a first end and a second end, the first end is connected with the riser card connector, and the second end is connected with the MiniSASHD connector connection. In this solution, the PCIESSD or PCIE device is expanded through the MiniSASHD connector to provide an expansion solution, but it does not solve the problem of signal quality degradation in the transfer between the motherboard and the backplane.

Contents of the invention

The technical task of this utility model is to provide an external adapter card to solve the problems of too long wires and lower signal quality when the main board of the server is cascaded to the back board of electronic equipment, so that the main board can be interconnected with different back boards. And the signal transmission quality is high.

The technical scheme that the utility model solves its technical problem adopts is:

An external adapter card, including a board, the board is provided with a PCIE bus interface, an external MiniSASHD connector, a PCIE ReDriver chip, and an EEPROM chip, and the PCIE ReDriver chip is respectively connected to the PCIE bus interface, the external MiniSASHD connector, and the EEPROM chip; The external MiniSASHD connector includes a PCIE to SASHD conversion circuit and an external MiniSASHD interface. One end of the PCIE to SASHD conversion circuit is connected to the PCIE ReDriver chip, and the other end of the PCIE to SASHD conversion circuit is connected to the external MiniSASHD interface.

Further, the PCIE bus interface adopts the PCIE×16 channel specification.

Further, the PCIE bus interface is 4 PCIE bus interfaces with a specification of PCIE×16 lanes.

Further, the external MiniSASHD connector is an external MiniSASHD 1×4 configuration connector at the board end.

Further, the external MiniSASHD interface is an SFF-8644 interface.

Further, the PCIE bus interface is located at the bottom of the board, and the MiniSASHD interface is located at the side of the board.

Further, the PCIE ReDriver chip selects a single PCIE ReDriver chip with 8-channel specification.

Further, the PCIEReDriver chip is a PI3EQX8984 type PCIEReDriver chip.

Compared with the prior art, an external adapter card of the present utility model has the following beneficial effects:

1. The adapter card is connected to the motherboard through the PCIE×16 bus interface, which is compatible with PCIE Gen1, 2, and 3 speeds, and can realize the interconnection between the motherboard and different backplanes;

2. There is a ReDriver chip in the adapter card, and the PI3EQX8984 PCIE ReDriver chip can automatically identify PCIE signals of different rates, adjust the signal completion of the PCIE signals, optimize the transmission quality of the PCIE signals, and improve the connection between the main board and the backplane. The quality of the transmitted signal;

3. The PCIEReDriver chip individually adjusts the chip parameters in the sending direction and receiving direction of each channel, which is applicable to the interconnection and intercommunication of various backplane systems, and has wide versatility.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a structural block diagram of an external riser card connecting a backplane and a mainboard;

Fig. 2 is a schematic structural diagram of an external riser card connecting the backplane and the mainboard;

In the figure, 1. board, 2. EEPROM chip, 3. PCIEReDriver chip, 4. PCIE bus interface, 5. external MiniSASHD connector, 6. motherboard, 7. PCIE slot, 8. backplane, 9. built-in Type MiniSASHD interface, 10, cable, 51, external MiniSASHD interface, 52, PCIE to SASHD conversion circuit.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Example 1

As shown in Figure 1 and Figure 2, an external adapter card includes a board 1, the board 1 is provided with a PCIE bus interface 4, an external MiniSASHD connector 5, a PCIE ReDriver chip 3, an EEPROM chip 2, and a PCIE ReDriver chip 3 are respectively connected to the PCIE bus interface 4, the external MiniSASHD connector 5, and the EEPROM chip 2; the external MiniSASHD connector 5 includes a PCIE to SASHD conversion circuit 52, an external MiniSASHD interface 51, and one end of the PCIE to SASHD conversion circuit 52 is connected to the PCIE ReDriver chip 3. The other end of the PCIE-to-SASHD conversion circuit 52 is connected to the external MiniSASHD interface 51 .

The PCIE bus interface 4 adopts the PCIE×16 channel specification, and the 4 PCIE bus interfaces with the PCIE×16 channel specification are set at the bottom of the board 1 in the form of golden fingers, and the PCIE bus interface 4 is used for plugging into the corresponding PCIE Slot 7, the PCIE slot 7 on the mainboard 6 is a PCIE×16 specification slot compatible with the PCIE bus interface 4, and realizes the interconnection between the mainboard 6 and the adapter card.

PCIE ReDriver chip 3, a signal conditioning chip also known as a signal repeater, can regenerate signals and increase signal quality on high-speed interfaces. PCIEReDriver chip 3 selects the PCIEReDriver chip of the PI3EQX8984 model of Pericom Company. The PCIEReDriver chip 3 can recognize and support PCIE signals at the rate of PCIEGen1/2/3. The device has 72 pins and is packaged in TQFN (English full name is MiniatureQuadFlatNo-leadPackage, Chinese translation is small four-sided flat package without lead), providing 4 bi-directional lines, a total of 8 input and output channels, for each channel independently perform equalization at the receiving end, de-emphasis at the sending end, and signal adjustment for signal gain amplification, and perform signal integrity testing, and check the output through the oscilloscope at the output end Figure, adjust and judge the optimal chip parameters for each channel.

The EEPROM chip 2 is used to save the optimal chip parameters of the PCIEReDriver chip 3. When the signal integrity test is performed in the PCIEReDriver chip 3, the optimal chip parameters obtained for each channel are burned and solidified in the EEPROM chip.

The external MiniSASHD connector 5 is an external MiniSASHD1×4 configuration connector at the board end, which is arranged on the side of the board 1, including a PCIE-to-SASHD conversion circuit 52, an external MiniSASHD interface 51, and one end of the PCIE-to-SASHD conversion circuit 52 is connected PCIEReDriver chip 3, the other end of the PCIE to SASHD conversion circuit 52 is connected to the external MiniSASHD interface 51, the external MiniSASHD interface 51 is connected to the backplane of the external electronic device, and the external MiniSASHD interface 51 is an SFF-8643 interface. Specifically, the built-in MiniSASHD interface 9 compatible with the MiniSASHD connector 5 of the adapter board is provided on the backplane 8, and one end of the cable 10 is plugged into the external MiniSASHD interface 51 of the MiniSASHD connector 5 on the adapter board. The other end of the cable 10 is plugged into the built-in MiniSASHD interface 9 on the backplane 8 , thereby realizing the connection between the backplane 8 and the mainboard 6 . In this embodiment, FCI's external board-side MiniSASHD1×4 configuration connector is selected, which meets the signal bandwidth requirements of 6Gb/s to 12Gb/s or the corresponding SAS2.1 and proposed SAS3.0 industry standard signal specifications , The connector interface conforms to the industry specification of SFF-8644 external application, is compatible with PCIE, and can be used in PCIE architecture.

When in use, the PCIE bus interface 4 of the external adapter card in this embodiment is plugged into the PCIE slot 7 of the motherboard 6, and at the same time, the external MiniSASHD interface 51 of the external adapter card is connected to the backplane 8 through the cable 10 The built-in MiniSASHD interface 9 realizes the interconnection between the motherboard 6 and the backplane 8 through the riser card, and the backplane 8 can be connected to PCIE devices such as PCIe SSD or PCIE switch. At the same time, the PCIEReDriver chip 3 in the adapter board adjusts the PCIE signal quality, and stores the detected optimal chip parameters into the EEPPROM chip 2, thereby realizing high-quality signal transmission of the motherboard 6 and the backplane 8 subsystems.

Through the above specific implementation methods, those skilled in the art can easily realize the utility model. However, it should be understood that the present utility model is not limited to the specific implementation manners described above. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features, so as to realize different technical solutions.

Claims (8)

1. An external adapter card is characterized in that it comprises a board, the board is provided with a PCIE bus interface, an external MiniSASHD connector, a PCIEReDriver chip, an EEPROM chip, and the PCIEReDriver chip is connected to the PCIE bus interface and the external MiniSASHD connection respectively. The external MiniSASHD connector includes a PCIE to SASHD conversion circuit and an external MiniSASHD interface. One end of the PCIE to SASHD conversion circuit is connected to the PCIE ReDriver chip, and the other end of the PCIE to SASHD conversion circuit is connected to the external MiniSASHD interface. 2. The external adapter card according to claim 1, characterized in that the PCIE bus interface adopts the PCIE×16 channel specification. 3. A kind of external adapter card according to claim 2, characterized in that said PCIE bus interface is a PCIE bus interface with 4 PCIE×16 channel specifications. 4. An external adapter card according to claim 1, characterized in that the external MiniSASHD connector is an external MiniSASHD1×4 configuration connector at the board end. 5. An external adapter card according to claim 1, characterized in that the external MiniSASHD interface is an SFF-8644 interface. 6. An external adapter card according to claim 1, 2, 3, 4 or 5, characterized in that the PCIE bus interface is located at the bottom of the board, and the external MiniSASHD interface is located at the side of the board . 7. The external adapter card according to claim 1, wherein the PCIE ReDriver chip is a PCIE ReDriver chip with a single 8-channel specification. 8. An external adapter card according to claim 7, characterized in that the PCIE ReDriver chip is a PCIE ReDriver chip of the PI3EQX8984 model.