Pinouts Description
The below tables lists the PCI Express pins description. For further details, please refer to PCI Express Interface.
DPU PCI Express x16 Pin Description
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 - (Connected in 900-9D3B4-00CC-EA0 & 900-9D3B4-00SC-EA0 only) |
A9 |
3.3V |
3.3V - (Connected in 900-9D3B4-00CC-EA0 & 900-9D3B4-00SC-EA0 only) |
B9 |
TRST# |
JTAG - Not Connected |
A10 |
3.3V |
3.3V - (Connected in 900-9D3B4-00CC-EA0 & 900-9D3B4-00SC-EA0 only) |
B10 |
3.3V_AUX |
|
A11 |
PERST# |
PCIe Reset |
B11 |
WAKW#/RSVD |
|
A12 |
GND |
B12 |
SER_DI |
||
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 |
SER_DO |
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 |
SER_CLK |
B32 |
GND |
||
A33 |
SER_CAPTURE |
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 |
PRSNT2# |
Mechanical Present |
|
A82 |
GND |
B82 |
GND |
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 8-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 8-pin ATX-type connectors can have different pinouts.
Pin Number |
Description |
1 |
12V |
2 |
12V |
3 |
12V |
4 |
Sense1 |
5 |
GND |
6 |
Sense0 |
7 |
GND |
8 |
GND |
The below tables list the NC-SI management interface pinout descriptions. For further details, please refer to NC-SI Management Interface.
Pin# |
Signal Name |
I/O |
Signal Description |
1 |
GND |
GND |
Ground |
2 |
PKG_ID1 |
Input (to BlueField-3) |
NC-SI PKG_ID Shoul be connected to the Primary controller NC-SI PKG_ID pins to set the appropriate package ID. PKG_ID0 should be connected to the endpoint device GPIO associated with Package ID[0]. PKG_ID1 should be associated with Package ID[1]. Baseboard should connect to GND or leave floating. DPU should have a 4.7k PU. |
3 |
RBT_RXD0 |
Output (from BlueField-3) |
Receive data. Data signals from the network controller to the BMC. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the connector. This signal requires a 100 kΩ pull down resistor to GND on the baseboard between the BMC and the RBT isolator to prevent the signal from floating when no card is installed. For DPUs, this pin should be connected between the connector and the RBT PHY. External termination determined by the DPU RBT PHY requirements. |
4 |
RBT_REF_CLK |
Input |
RBT Reference clock. Synchronous clock reference for receive, transmit and control interface. The clock should have a typical frequency of 50MHz ±50 ppm. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the DPU cable connector. The RBT_REF_CLK should not be driven until 3.3V AUX is present on the DPU. The RBT_REF_CLK should be continuous once it has started. For DPUs, this pin should be connected between the connector and the RBT PHY. No external termination is required. |
5 |
RBT_RXD1 |
Output |
Receive data. Data signals from the network controller to the BMC. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the connector. This signal requires a 100 kΩ pull down resistor to GND on the baseboard between the BMC and the RBT isolator to prevent the signal from floating when no card is installed. For DPUs, this pin should be connected between the connector and the RBT PHY. External termination determined by the DPU RBT PHY requirements. |
6 |
GND |
GND |
Ground |
7 |
RBT_CRS_DV |
Output |
Carrier sense/receive data valid. This signal is used to indicate to the baseboard that the carrier sense/receive data is valid. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the connector. This signal requires a 100 kΩ pull down resistor on the baseboard between the BMC and the RBT isolator to prevent the signal from floating when no DPU is installed. For DPUs, this pin should be connected between the connector and the RBT PHY. External termination determined by the DPU RBT PHY requirements. |
8 |
RBT_ISOLATE_N |
Output |
This signal is used to indicate the DPU has powered and is ready for NC-SI physical layer connection to be present. When low the baseboard circuitry will isolate the NC-SI connection to the DPU. When high normal NC-SI RBT connectivity is available. Baseboards should terminate this with a 47K-100K PD resistor. DPUs should terminate with a 10k PU resistor. |
9 |
GND |
GND |
Ground |
10 |
PKG_ID0 |
Input |
NC-SI PKG_ID should be connected to the Primary controller NC-SI PKG_ID pins to set the appropriate package ID. PKG_ID0 should be connected to the endpoint device GPIO associated with Package ID[0]. PKG_ID1 should be associated with Package ID[1]. Baseboard should connect to GND or leave floating. DPU should have a 4.7k PU. |
11 |
RBT_TX_EN |
Input |
Transmit enable. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the connector. This signal requires a 100 kΩ pull down resistor to ground on the baseboard between the RBT isolator and the DPU cable connector to prevent the card-side signals from floating when the RBT signals are isolated. For DPUs, this pin should be connected between the connector and the RBT PHY. External termination determined by the DPU RBT PHY requirements. |
12 |
GND |
GND |
Ground |
13 |
RBT_TXD0 |
Input |
Transmit data. Data signals from the BMC to the network controller. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the connector. This signal requires a 100 kΩ pull down resistor to GND on the baseboard between the RBT isolator and the DPU cable connector to prevent the card-side signals from floating when the RBT signals are isolated. For DPUs, this pin should be connected between the connector and the RBT PHY. External termination determined by the DPU RBT PHY requirements. |
14 |
UART_TX |
Input |
3.3V UART TX signal from the baseboard |
15 |
RBT_TXD1 |
Input |
Transmit data. Data signals from the BMC to the network controller. For baseboards, this pin should be connected between the baseboard NC-SI over RBT PHY and the connector. This signal requires a 100 kΩ pull down resistor to GND on the baseboard between the RBT isolator and the DPU cable connector to prevent the card-side signals from floating when the RBT signals are isolated. For DPUs, this pin should be connected between the connector and the RBT PHY. External termination determined by the DPU RBT PHY requirements. |
16 |
UART_RX |
Output |
3.3V UART RX signal to the baseboard |
17 |
PRESENCE_N |
Presence of DPU. Baseboard should implement a 200 Ω series resistor and 4.7kohm pull-up resistor to 3.3V AUX. DPU should tie this to GND. |
|
18 |
GND |
GND |
Ground |
19 |
RBT_ARB_OUT |
Input |
NC-SI hardware arbitration output. If the baseboard supports multiple DPUs cards connected to the same RBT interface, it should implement logic that connects the RBT_ARB_OUT pin of the first populated DPU card to its RBT_ARB_IN pin if it is the only card present or to the RBT_ARB_IN pin of the next populated card and so on sequentially for all cards on the specified RBT bus to ensure the arbitration ring is complete. This logic should bypass slots that are not populated or powered off. |
20 |
RBT_ARB_IN |
Output |
NC-SI hardware arbitration input. If the baseboard supports multiple DPUs cards connected to the same RBT interface, it should implement logic that connects the RBT_ARB_IN pin of the first populated DPU card to its RBT_ARB_OUT pin if it is the only card present or to the RBT_ARB_OUT pin of the next populated card and so on sequentially for all cards on the specified RBT bus to ensure the arbitration ring is complete. This logic should bypass slots that are not populated or powered off. |
Component Side
Pin# |
Signal Name |
Wire Type |
AWG# |
Pin# on other end |
1 |
GND |
GND BAR |
1 |
|
2 |
PCIE_REFCLK1_P |
Micro coax |
38 |
2 |
3 |
PCIE_REFCLK1_N |
Micro coax |
38 |
3 |
4 |
GND |
GND BAR |
4 |
|
5 |
PCIE_CPU_CX_15N |
Micro coax |
38 |
5 |
6 |
PCIE_CPU_CX_15P |
Micro coax |
38 |
6 |
7 |
GND |
GND BAR |
7 |
|
8 |
PCIE_CPU_CX_14N |
Micro coax |
38 |
8 |
9 |
PCIE_CPU_CX_14P |
Micro coax |
38 |
9 |
10 |
GND |
GND BAR |
10 |
|
11 |
PCIE_CPU_CX_13N |
Micro coax |
38 |
11 |
12 |
PCIE_CPU_CX_13P |
Micro coax |
38 |
12 |
13 |
GND |
GND BAR |
13 |
|
14 |
PCIE_CPU_CX_12N |
Micro coax |
38 |
14 |
15 |
PCIE_CPU_CX_12P |
Micro coax |
38 |
15 |
16 |
GND |
GND BAR |
16 |
|
17 |
PCIE_CPU_CX_11N |
Micro coax |
38 |
17 |
18 |
PCIE_CPU_CX_11P |
Micro coax |
38 |
18 |
19 |
GND |
GND BAR |
19 |
|
20 |
PCIE_CPU_CX_10N |
Micro coax |
38 |
20 |
21 |
PCIE_CPU_CX_10P |
Micro coax |
38 |
21 |
22 |
GND |
GND BAR |
22 |
|
23 |
PCIE_CPU_CX_9N |
Micro coax |
38 |
23 |
24 |
PCIE_CPU_CX_9P |
Micro coax |
38 |
24 |
25 |
GND |
GND BAR |
25 |
|
26 |
PCIE_CPU_CX_8N |
Micro coax |
38 |
26 |
27 |
PCIE_CPU_CX_8P |
Micro coax |
38 |
27 |
28 |
GND |
GND BAR |
28 |
|
29 |
PCIE_CPU_CX_7N |
Micro coax |
38 |
29 |
30 |
PCIE_CPU_CX_7P |
Micro coax |
38 |
30 |
31 |
GND |
GND BAR |
31 |
|
32 |
CIE_CPU_CX_6N |
Micro coax |
38 |
32 |
33 |
PCIE_CPU_CX_6P |
Micro coax |
38 |
33 |
34 |
GND |
GND BAR |
34 |
|
35 |
PCIE_CPU_CX_5N |
Micro coax |
38 |
35 |
36 |
PCIE_CPU_CX_5P |
Micro coax |
38 |
36 |
37 |
GND |
GND BAR |
37 |
|
38 |
PCIE_CPU_CX_4N |
Micro coax |
38 |
38 |
39 |
PCIE_CPU_CX_4P |
Micro coax |
38 |
39 |
40 |
GND |
GND BAR |
40 |
|
41 |
PCIE_CPU_CX_3N |
Micro coax |
38 |
41 |
42 |
PCIE_CPU_CX_3P |
Micro coax |
38 |
42 |
43 |
GND |
GND BAR |
43 |
|
44 |
PCIE_CPU_CX_2N |
Micro coax |
38 |
44 |
45 |
PCIE_CPU_CX_2P |
Micro coax |
38 |
45 |
46 |
GND |
GND BAR |
46 |
|
47 |
PCIE_CPU_CX_1N |
Micro coax |
38 |
47 |
48 |
PCIE_CPU_CX_1P |
Micro coax |
38 |
48 |
49 |
GND |
GND BAR |
49 |
|
50 |
PCIE_CPU_CX_0N |
Micro coax |
38 |
50 |
51 |
PCIE_CPU_CX_0P |
Micro coax |
38 |
51 |
52 |
GND |
GND BAR |
52 |
|
53 |
No wire |
Micro coax |
38 |
53 |
54 |
No wire |
Micro coax |
38 |
54 |
55 |
AUX_PGOOD |
Micro coax |
38 |
55 |
56 |
No wire |
Micro coax |
38 |
56 |
57 |
I2C_AUX_SCL |
Micro coax |
38 |
57 |
58 |
I2C_AUX_SDA |
Micro coax |
38 |
58 |
59 |
S_PRSNT1_L |
Micro coax |
38 |
59 |
60 |
No wire |
60 |
Print Side
Pin# |
Signal Name |
Wire Type |
AWG# |
Pin# on other end |
1 |
No wire |
Micro coax |
38 |
1 |
2 |
No wire |
Micro coax |
38 |
2 |
3 |
No wire |
Micro coax |
38 |
3 |
4 |
No wire |
Micro coax |
38 |
4 |
5 |
No wire |
Micro coax |
38 |
5 |
6 |
Reserved_06 |
Micro coax |
38 |
6 |
7 |
Reserved_07 |
Micro coax |
38 |
7 |
8 |
Reserved_08 |
Micro coax |
38 |
8 |
9 |
GND |
GND BAR |
9 |
|
10 |
PCIE_CPU_CX_0P |
Micro coax |
38 |
10 |
11 |
PCIE_CPU_CX_0N |
Micro coax |
38 |
11 |
12 |
GND |
GND BAR |
12 |
|
13 |
PCIE_CPU_CX_1P |
Micro coax |
38 |
13 |
14 |
PCIE_CPU_CX_1N |
Micro coax |
38 |
14 |
15 |
GND |
GND BAR |
15 |
|
16 |
PCIE_CPU_CX_2P |
Micro coax |
38 |
16 |
17 |
PCIE_CPU_CX_2N |
Micro coax |
38 |
17 |
18 |
GND |
GND BAR |
18 |
|
19 |
PCIE_CPU_CX_3P |
Micro coax |
38 |
19 |
20 |
PCIE_CPU_CX_3N |
Micro coax |
38 |
20 |
21 |
GND |
GND BAR |
21 |
|
22 |
PCIE_CPU_CX_4P |
Micro coax |
38 |
22 |
23 |
PCIE_CPU_CX_4N |
Micro coax |
38 |
23 |
24 |
GND |
GND BAR |
24 |
|
25 |
PCIE_CPU_CX_5P |
Micro coax |
38 |
25 |
26 |
PCIE_CPU_CX_5N |
Micro coax |
38 |
26 |
27 |
GND |
GND BAR |
27 |
|
28 |
PCIE_CPU_CX_6P |
Micro coax |
38 |
28 |
29 |
PCIE_CPU_CX_6N |
Micro coax |
38 |
29 |
30 |
GND |
GND BAR |
30 |
|
31 |
PCIE_CPU_CX_7P |
Micro coax |
38 |
31 |
32 |
PCIE_CPU_CX_7N |
Micro coax |
38 |
32 |
33 |
GND |
GND BAR |
33 |
|
34 |
PCIE_CPU_CX_8P |
Micro coax |
38 |
34 |
35 |
PCIE_CPU_CX_8N |
Micro coax |
38 |
35 |
36 |
GND |
GND BAR |
36 |
|
37 |
PCIE_CPU_CX_9P |
Micro coax |
38 |
37 |
38 |
PCIE_CPU_CX_9N |
Micro coax |
38 |
38 |
39 |
GND |
GND BAR |
39 |
|
40 |
PCIE_CPU_CX_10P |
Micro coax |
38 |
40 |
41 |
PCIE_CPU_CX_10N |
Micro coax |
38 |
41 |
42 |
GND |
GND BAR |
42 |
|
43 |
PCIE_CPU_CX_11P |
Micro coax |
38 |
43 |
44 |
PCIE_CPU_CX_11N |
Micro coax |
38 |
44 |
45 |
GND |
GND BAR |
45 |
|
46 |
PCIE_CPU_CX_12P |
Micro coax |
38 |
46 |
47 |
PCIE_CPU_CX_12N |
Micro coax |
38 |
47 |
48 |
GND |
GND BAR |
48 |
|
49 |
PCIE_CPU_CX_13P |
Micro coax |
38 |
49 |
50 |
PCIE_CPU_CX_13N |
Micro coax |
38 |
50 |
51 |
GND |
GND BAR |
51 |
|
52 |
PCIE_CPU_CX_14P |
Micro coax |
38 |
52 |
53 |
PCIE_CPU_CX_14N |
Micro coax |
38 |
53 |
54 |
GND |
GND BAR |
54 |
|
55 |
PCIE_CPU_CX_15P |
Micro coax |
38 |
55 |
56 |
PCIE_CPU_CX_15N |
Micro coax |
38 |
56 |
57 |
GND |
GND BAR |
57 |
|
58 |
S_PERST1_CONN_L |
Micro coax |
38 |
58 |
59 |
No wire |
No Wire |
59 |
|
60 |
S_PRSNT2_L |
Micro coax |
38 |
60 |