Intel SR6850HW4 manual 6

Table of Contents		Intel® Server Platform SR6850HW4 TPS
7.2.1	SCSI Buses ...........................................................................................................		73
7.2.2	SCSI Drive Power Control .....................................................................................		73
7.2.3	SCSI Enclosure Management ...............................................................................		75
7.2.4	Server Management Interface ...............................................................................		76
7.2.5	Resets....................................................................................................................		77
7.2.6	Connector Interlocks..............................................................................................		77
7.2.7	Clock Generation ...................................................................................................		77
7.2.8	Programmed Devices ............................................................................................		78
7.3	Signal Descriptions ................................................................................................		78
7.3.1	Power from the Power Distribution Board..............................................................		79
7.3.2	Front Panel Power Connector ...............................................................................		79
7.3.3	Front Panel I/O Board Ribbon Cable Connector ...................................................		79
7.3.4	LVD SCSI 68-pin Connector..................................................................................		80
7.3.5	SCA2 80-pin Drive Connectors..............................................................................		81
7.3.6	Fans.......................................................................................................................		82
7.3.7	Internal Logic Signals ............................................................................................		82
7.4	Electrical, Environmental, and Mechanical Specifications.....................................		83
7.4.1	Electrical Specifications .........................................................................................		83
8. Front Panel I/O and Control Boards .................................................................................			85
8.1	Introduction ............................................................................................................		85
8.1.1	Block Diagram .......................................................................................................		85
8.1.2	Architectural Overview...........................................................................................		86
8.1.3	Component Location..............................................................................................		87
8.2	Functional Architecture ..........................................................................................		88
8.2.1	VGA .......................................................................................................................		88
8.2.2	USB .......................................................................................................................		88
8.2.3	NMI Button.............................................................................................................		88
8.3	Signal Descriptions ................................................................................................		89
8.3.1	USB Connector......................................................................................................		89
8.3.2	Front Panel VGA Connector ..................................................................................		90
8.4	Electrical, Environmental, and Mechanical Specifications.....................................		90
8.4.1	Electrical Specifications .........................................................................................		90
8.4.2	Connector Specifications .......................................................................................		91
8.4.3	Cooling Requirements ...........................................................................................		91
8.5	Front Panel Control Module...................................................................................		92
vi			Revision 1.0
	Intel order number D23151-001