Pin Description

PCI Express Interface

The below tables lists the PCI Express pins description. For further details, please refer to PCI Express Interface.

Pin #	Signal Name	Description	Pin #	Signal Name	Description
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	WAKW#/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	RSVD
A49	GND		B49	GND
A50	RSVD		B50	PETP8
A51	GND		B51	PETN8
A52	PERP8		B52	GND
A53	PERN8		B53	GND
A54	GND		B54	PETP9
A55	GND		B55	PETN9
A56	PERP9		B56	GND
A57	PERN9		B57	GND
A58	GND		B58	PETP10
A59	GND		B59	PETN10
A60	PERP10		B60	GND
A61	PERN10		B61	GND
A62	GND		B62	PETP11
A63	GND		B63	PETN11
A64	PERP11		B64	GND
A65	PERN11		B65	GND
A66	GND		B66	PETP12
A67	GND		B67	PETN12
A68	PERP12		B68	GND
A69	PERN12		B69	GND
A70	GND		B70	PETP13
A71	GND		B71	PETN13
A72	PERP13		B72	GND
A73	PERN13		B73	GND
A74	GND		B74	PETP14
A75	GND		B75	PETN14
A76	PERP14		B76	GND
A77	PERN14		B77	GND
A78	GND		B78	PETP15
A79	GND		B79	PETN15
A80	PERP15		B80	GND
A81	PERN15		B81	GND
A82	GND		B82	PRSNT2#	Mechanical Present

4-pin Vertical USB Connector

The below table provides the 4-pin vertical USB connector on the DPU. For further details, please refer to USB Interface.

Pin #	Signal
1	+5V_USB
2	USB DP
3	USB DN
4	GND

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.

Important

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 connectors can have different pinouts.

Pin#	Signal Name	Description
1	12V	ATX Supplied 12V
2	12V	ATX Supplied 12V
3	12V	ATX Supplied 12V
4	GND	Power Return
5	Not connected	Unused
6	GND	Power Return

NC-SI Management Interface

The below tables list the NC-SI management interface pinout descriptions per card type. Please follow the link to the table coinciding with the OPN you have purchased.

OPN	Link to NC-SI connector mapping
MBF2M345A-HECOT	Table A - NC-SI Connector Pins
MBF2M345A-HESOT	Table A - NC-SI Connector Pins
MBF2M516A-EECOT	Table B - NC-SI Connector Pins
MBF2M516A-EEEOT
MBF2M516A-EENOT
MBF2H516A-EECOT
MBF2H516A-EEEOT
MBF2H516A-EENOT
MBF2H516C-EECOT
MBF2H516C-EESOT
MBF2M516C-EECOT
MBF2M516C-EESOT

Table A - NC-SI Connector Pins

Warning

This table applies to all HW versions of MBF2M345A-HECOT and MBF2M345A-HESOT.

PACK_ID[2:0] signals allow for 8 unique card IDs. The system configurator sets the unique value per card via the connecting harness.

Pin #	Pin Name	I/O	Description / Comments
1	NCSI_REF_CLK	Input	50MHz REF CLK for NC-SI BUS
2	GND	GND	Ground
3	NCSI_ARB_IN	Input	NC-SI hardware arbitration input
4	PACK_ID0, connected to BlueField-2 NIC_GPIO[49]	Input	See the note above table
5	NCSI_ARB_OUT	Output	NC-SI hardware arbitration output
6	PACK_ID1, connected to BlueField-2 NIC_GPIO[47]	Input	See the note above table
7	NCSI_RX_D0	Output	Receive Data Out 0
8	GND	GND	Ground
9	NCSI_RX_D1	Output	Receive Data Out 1
10	GND	GND	Ground
11	NCSI_CRS_DV	Output	Carrier Sense / Receive Data Valid
12	GND	GND	Ground
13	NCSI_TX_D0	Input	Transmit Data In 0
14	GND	GND	Ground
15	NCSI_TX_D1	Input	Transmit Data In 0
16	GND	GND	Ground
17	NCSI_TX_EN	Input	Transmit Enable
18	GND	GND	Ground
19	Reserved
20	SOFT_RST#, connected to BlueField-2 device pin HOST_GPIO[7]
21	ARM_I2C1_SDA	Input/Output	Open-drain signal
22	ARM_NSRST#	Input/Output	Open-drain signal
23	ARM_I2C1_SCL	Input/Output	Open-drain signal
24	PACK_ID2, connected to BlueField-2 device pin NIC_GPIO[46]	Input	See description above table
25	GND	GND	Ground
26	Not Connected
27	Not Connected
28	BF_UART0_TX	Output	UART transmit serial data output
29	Not Connected
30	BF_UART0_RX	Input	UART transmit serial data input

Table B - NC-SI Connector Pins