Enclosure Management Controller; Sata/Sas Interface; I 2 C Serial Bus Interface - Intel SC5300BRP Technical Product Specification

Intel® Server Chassis SC5300 5U Kit TPS
5.2.1

Enclosure Management Controller

The QLogic* GEM424 is an enclosure management controller for the SATA/SAS backplane and
monitors various aspects of a storage enclosure. The chip provides out-of-band SAF-TE
management through the SATA/SAS Host I
the IPMI specification by providing management data to a baseboard management controller
through the IPMB.
The GEM424 has general input and output pins (GPIO) that allow customization. These GPIOs
are used for hardware drive detection and driving FAULT and ACTIVITY LEDs.
The GEM424 controller comes in an 80-pin Thin Quad Flat Pack (TQFP) package and operates
from the 3.3V rail with an input clock frequency of 20MHz.
5.2.2

SATA/SAS Interface

The GEM424 controller implements SAF-TE over the HBA I
controller supports the following SAF-TE Command Set:
•
Read Enclosure Configuration
•
Read Enclosure Status
•
Read Device Slot Status
•
Read Global Flags
•
Write Device Slot Status
•
Perform Slot Operation
2
5.2.3 I C Serial Bus Interface
The GEM424 controller supports two independent I
2
400Kbits. The I C core incorporates 8-bit FIFOs for data transfer buffering. The I
supports National* LM75 or equivalent I
temperature value readings to be returned to the host. The Intelligent Platform Management
Bus (IPMB) is supported through I
The following figure provides a block diagram of the I
6HDD SATA/SAS HSBP.
Revision 1.31
2
C interface. The GEM424 controller also supports
2
C interface ports with bus speeds of up to
2
C -based temperature sensors. This enables actual
2
C port 0.
2
C bus connection implemented on the
Hard Disk Drive Bays
2
C interface. The GEM424
2
C bus
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