Nvidia BlueField-3 - Page 84

84
Pin# Signal Name Wire Type AWG# Detailed
Description
Pin# on the
other end
4 S_PERST2_CONN_L   Micro coax 38 Optional: PCIe
compliant PERST_L
(active low PCI
Reset) signal for the
Cabline CA-II Plus
PCIe interface. To be
used as the PERST_L
signal for the control
of PCIe lane 15:8,
when a bifurcation
of the Cabline CA-II
Plus PCIe x16
interface to two x8
interfaces is needed
(and in specific main
board assemblies
which support such
bifurcation). The
direction of this
optional PERST_L
signal depends on
the implementation:
When connecting a
CPU root complex to
the Cabline CA-II
Plus PCIe interface,
this signal is driven
from the
motherboard side
(from the CPU), to
the BlueField DPU;
When connecting a
GPU or an end point
to the Cabline CA-II
Plus PCIe interface,
this signal is driven
from the BlueField
DPU (which operates
as a PCIe switch in
this case), to the
GPU or end-point on
the motherboard
side.
4
5 SER_DI Micro coax 38 This pin is used as
the serializer data in
from the device/s
located on the
motherboard.
5
6 Reserved_06 Micro coax 38 6
7 Reserved_07 Micro coax 38 Reserved for future
expansion
7
8 Reserved_08 Micro coax 38 Reserved for future
expansion
8
9 GND GND BAR 9