Broadcom 96xx User Guide
Broadcom
®
96xx PCIe 4.0, 24G SAS MegaRAID
™
and eHBA Tri-Mode Storage Adapters
Pin Name Settings Description
C_TYPE,
D_INPL#,
CHANGE_DET#
— Open collector/drain input or output signal.
•
C_TYPE. If BP_TYPE is 0, the adapter drives this signal LOW. If BP_TYPE
is 1, this signal adheres to the SFF-8448 requirement to drive this signal to 1
in response to floating the signal. Because this signal is an open drain signal,
driving to 1 is when a pull-up resistor pulls this signal HIGH.
•
D_INPL#. When C_TYPE is HIGH, the backplane pulls this signal to ground
to indicate an NVMe device is connected and a two-wire interface backplane
management target might be on the sideband’s two-wire interface.
•
CHANGE_DET#. If D_INPL# is 0 and a UBM FRU device is discovered on the
two-wire interface, the UBM FRU data can inform the adapter that the device
is CHANGE_DET# feature capable. The adapter can rely on this signal as the
CHANGE_DET# signal as described in the UBM specification. In this mode, the
UBM controller drives this signal LOW to assert CHANGE_DET#.
Broadcom
96xx-MR-HBA-Tri-Mode-UG108
19
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