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PCI Express Interface

DPU PCI Express x8 Pin Description 

Pin #Signal NameDescriptionPin #Signal NameDescription

A1

PRSNT1#

Mechanical Present

B1

12V


A2

12V


B2

12V


A3

12V


B3

12V


A4

GND


B4

GND


A5

TCK

JTAG - Not Connected

B5

SMCLK

Host SMBus

A6

TDI

JTAG - Not Connected

B6

SMDAT

Host SMBus

A7

TDO

JTAG - Not Connected

B7

GND


A8

TMS

JTAG - Not Connected

B8

3.3V

3.3V - Not Connected

A9

3.3V

3.3V - Not Connected

B9

TRST#

JTAG - Not Connected

A10

3.3V

3.3V - Not Connected

B10

3.3V_AUX


A11

PERST#

PCIe Reset

B11

WAKE#/RSVD


A12

GND


B12

RSVD


A13

REFCLK+

Host Reference Clock

B13

GND


A14

REFCLK-

Host Reference Clock

B14

PETP0


A15

GND


B15

PETN0


A16

PERP0


B16

GND


A17

PERN0


B17

RSVD


A18

GND


B18

GND


A19

RSVD


B19

PETP1


A20

GND


B20

PETN1


A21

PERP1


B21

GND


A22

PERN1


B22

GND


A23

GND


B23

PETP2


A24

GND


B24

PETN2


A25

PERP2


B25

GND


A26

PERN2


B26

GND


A27

GND


B27

PETP3


A28

GND


B28

PETN3


A29

PERP3


B29

GND


A30

PERN3


B30

RSVD


A31

GND


B31

RSVD


A32

RSVD


B32

GND


A33

RSVD


B33

PETP4


A34

GND


B34

PETN4


A35

PERP4


B35

GND


A36

PERN4


B36

GND


A37

GND


B37

PETP5


A38

GND


B38

PETN5


A39

PERP5


B39

GND


A40

PERN5


B40

GND


A41

GND


B41

PETP6


A42

GND


B42

PETN6


A43

PERP6


B43

GND


A44

PERN6


B44

GND


A45

GND


B45

PETP7


A46

GND


B46

PETN7


A47

PERP7


B47

GND


A48

PERN7


B48

PRSNT2#

Mechanical Present

A49

GND


B49

GND


DPU PCI Express x16 Pin Description 

Pin #Signal NameDescriptionPin #Signal NameDescription
A1PRSNT1#Mechanical PresentB112V
A212V
B212V
A312V
B312V
A4GND
B4GND
A5TCKJTAG - Not ConnectedB5SMCLKHost SMBus
A6TDIJTAG - Not ConnectedB6SMDATHost SMBus
A7TDOJTAG - Not ConnectedB7GND
A8TMSJTAG - Not ConnectedB83.3V3.3V - Not Connected
A93.3V3.3V - Not ConnectedB9TRST#JTAG - Not Connected
A103.3V3.3V - Not ConnectedB103.3V_AUX
A11PERST#PCIe ResetB11WAKE#/RSVD
A12GND
B12RSVD
A13REFCLK+Host Reference ClockB13GND
A14REFCLK-Host Reference ClockB14PETP0
A15GND
B15PETN0
A16PERP0
B16GND
A17PERN0
B17RSVD
A18GND
B18GND
A19RSVD
B19PETP1
A20GND
B20PETN1
A21PERP1
B21GND
A22PERN1
B22GND
A23GND
B23PETP2
A24GND
B24PETN2
A25PERP2
B25GND
A26PERN2
B26GND
A27GND
B27PETP3
A28GND
B28PETN3
A29PERP3
B29GND
A30PERN3
B30RSVD
A31GND
B31RSVD
A32RSVD
B32GND
A33RSVD
B33PETP4
A34GND
B34PETN4
A35PERP4
B35GND
A36PERN4
B36GND
A37GND
B37PETP5
A38GND
B38PETN5
A39PERP5
B39GND
A40PERN5
B40GND
A41GND
B41PETP6
A42GND
B42PETN6
A43PERP6
B43GND
A44PERN6
B44GND
A45GND
B45PETP7
A46GND
B46PETN7
A47PERP7
B47GND
A48PERN7
B48RSVD
A49GND
B49GND
A50RSVD
B50PETP8
A51GND
B51PETN8
A52PERP8
B52GND
A53PERN8
B53GND
A54GND
B54PETP9
A55GND
B55PETN9
A56PERP9
B56GND
A57PERN9
B57GND
A58GND
B58PETP10
A59GND
B59PETN10
A60PERP10
B60GND
A61PERN10
B61GND
A62GND
B62PETP11
A63GND
B63PETN11
A64PERP11
B64GND
A65PERN11
B65GND
A66GND
B66PETP12
A67GND
B67PETN12
A68PERP12
B68GND
A69PERN12
B69GND
A70GND
B70PETP13
A71GND
B71PETN13
A72PERP13
B72GND
A73PERN13
B73GND
A74GND
B74PETP14
A75GND
B75PETN14
A76PERP14
B76GND
A77PERN14
B77GND
A78GND
B78PETP15
A79GND
B79PETN15
A80PERP15
B80GND
A81PERN15
B81PRSNT2#Mechanical Present
A82GND
B82RSVD

NC-SI Management Interface

The table below uses terms described in the following legend:

  • Group 1: MBF2H322A-AECOT, MBF2H322A-AEEOT, MBF2H322A-AENOT, MBF2H332A-AECOT, MBF2H332A-AEEOT, MBF2H332A-AENOT, MBF2M355A-VECOT, MBF2M355A-VESOT
  • Group 2: MBF2H516C-CECOT, MBF2H516C-CESOT, MBF2M516C-CECOT, MBF2M516C-CESOT, MBF2H536C-CECOT, MBF2H536C-CESOT
  • Group 3: MBF2H512C-AECOT, MBF2H512C-AESOT, MBF2H522C-AECOT, MBF2H522C-AESOT, MBF2H532C-AECOT, MBF2H532C-AESOT
  • Group 4: MBF2H516A-CEEOT, MBF2H516A-CENOT, MBF2M516A-CECOT, MBF2M516A-CEEOT, MBF2M516A-CENOT
  • Group 5: MBS2M512C-AECOT, MBS2M512C-AESOT
  • PACK_ID[2:0] signals allow for 8 unique card IDs. System configurator sets the unique value per card via the connecting harness.

Pin #

Group 1, Group 4

Group 2, Group 3, Group 5

I/ODescription / Comments
1NCSI_REF_CLKNCSI_REF_CLKInput50MHz REF CLK for NC-SI BUS
2GNDGNDGNDGround
3NCSI_ARB_INNCSI_ARB_INInputNC-SI hardware arbitration input
4PACK_ID0, connected to BlueField-2 NIC_GPIO[49]PACK_ID0, connected to BlueField-2 device pin NIC_GPIO[49]InputSee description above table
5NCSI_ARB_OUTNCSI_ARB_OUTOutputNC-SI hardware arbitration output
6PACK_ID1, connected to BlueField-2 NIC_GPIO[47]PACK_ID1, connected to BlueField-2 device pin NIC_GPIO[47]InputSee description above table
7NCSI_RX_D0NCSI_RX_D0OutputReceive Data Out 0
8GNDGNDGNDGround
9NCSI_RX_D1NCSI_RX_D1OutputReceive Data Out 1
10GNDGNDGNDGround
11NCSI_CRS_DVNCSI_CRS_DVOutputCarrier Sense / Receive Data Valid
12GNDGNDGNDGround
13NCSI_TX_D0NCSI_TX_D0InputTransmit Data In 0
14GNDGNDGNDGround
15NCSI_TX_D1NCSI_TX_D1InputTransmit Data In 0
16GNDGNDGNDGround
17NCSI_TX_ENNCSI_TX_ENInputTransmit Enable
18GNDGNDGNDGround
19ReservedReserved

20SOFT_RST#, connected to BlueField-2 device pin HOST_GPIO[7]Reserved

21ARM_I2C1_SDABMC_I2C2_SDAInput/OutputOpen-drain signal
22ARM_NSRST#NIC_BMC_CTRL1, connected to BMC device pin W4 (Open Drain)Input/OutputOpen-drain signal
23ARM_I2C1_SCLBMC_I2C2_SCLInput/OutputOpen-drain signal
24PACK_ID2, connected to BlueField-2 device pin NIC_GPIO[46]PACK_ID2, connected to BlueField-2 device pin NIC_GPIO[46]InputSee description above table
25GNDGNDGNDGround
26Not Connected

NIC_BMC_CTRL0, connected to BMC device pin Y3 (Open Drain)



27Not ConnectedNot Connected

28BF_UART0_TXBMC_TX5OutputUART transmit serial data output
29Not ConnectedNot Connected

30BF_UART0_RXBMC_RX5InputUART transmit serial data input

External Power Supply Connector

The below table provides the External Power Supply pins of the external power supply interfaces on the DPU. For further details, please refer to External PCIe Power Supply Connector.

The mechanical pinout of the 6-pin external +12V power connector is shown below. The +12V connector is a GPU power PCIe standard connector. Care should be taken to ensure the power is applied to the correct pins as some 6-pin ATX type connector can have different pinouts.

Pin#Signal NameDescription
112VATX Supplied 12V
212VATX Supplied 12V
312VATX Supplied 12V
4GNDPower Return
5GNDPower Return
6GNDPower Return

M.2 Socket

Pin #

Signal
Name

Description

1

GND

Ground

2

3.3 V

 Supply pin, 3.3 V

3

GND

  Ground

4

3.3 V

  Supply pin, 3.3 V

5

PERn3

  PCIe Lane 3 Rx

6

N/A

  

7

PERp3

 PCIe Lane 3 Rx

8

N/A


9

GND

  Ground

10

NC

  

11

PETn3

  PCIe Lane 3 Tx

12

3.3 V

 Supply pin, 3.3 V

13

PETp3

 PCIe Lane 3 Tx

14

3.3 V

 Supply pin, 3.3 V

15

GND

 Ground

16

3.3V

 Supply pin, 3.3 V

17

PERn2

PCIe Lane 2 Rx

18

3.3 V

 Supply pin, 3.3 V

19

PERp2

PCIe Lane 2 Rx

20

N/A

  

21

GND

  Ground

22

N/A

  

23

PETn2

 PCIe Lane 2 Tx

24

N/A


25

PETp2

 PCIe Lane 2 Tx

26

N/A


27

GND

  Ground

28

N/A

  

29

PERn1

  PCIe Lane 1 Rx

30

N/A

  

31

PERp1

  PCIe Lane 1 Rx

32

N/A

  

33

GND

  Ground

34

N/A

  

35

PETn1

  PCIe Lane 1 Tx

36

N/A

  

37

PETp1

  PCIe Lane 1 Tx

38

DEVSLP

 Device Sleep, input. If driven high the host is informing the
SSD to enter a low power state.

39

GND

  Ground

40

N/A

  

41

PERn0

 PCIe Lane 0 Rx

42

N/A

  

43

PERp0

 PCIe Lane 0 Rx

44

N/A

  

45

GND

  Ground

46

N/A

  

47

PETn0

 PCIe Lane 0 Tx

48

N/A

  

49

PETp0

  PCIe mode PCIe Lane 0 Tx

50

PERST#

  PCIe reset

51

GND

  Ground

52

NC


53

REFCLKN

  PCIe Reference Clock signals (100 MHz)

54

NC

  

55

REFCLKP

  PCIe Reference Clock signals (100 MHz)

56

NC


57

GND

  Ground

58

NC


59-66

removed

  Mechanical notch M

67

N/A

  

68

NC


69

NC


70

3.3 V

  Supply pin, 3.3 V

71

GND

 Ground

72

3.3 V

Supply pin, 3.3 V

73

GND

 Ground

74

3.3 V

Supply pin, 3.3 V

75

NC