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Technical Reference Guide www.hp.com 5-1

Input/Output Interfaces

5.1 Introduction

This chapter describes the standard interfaces that provide input and output (I/O) porting of data

and that are controlled through I/O-mapped registers. The following I/O interfaces are covered in

this chapter:

■ SATA/eSATA interfaces (5.2)

■ Diskette drive interface (5.3)

■ Serial interfaces (5.4)

■ Parallel interface support (5.5)

■ Keyboard/pointing device interface (5.6)

■ Universal serial bus interface (5.7)

■ Audio subsystem (5.8)

■ Network interface controller (5.9)

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 119 120

Technical Reference Guide 1
Contents 3
3 Processor/Memory Subsystem 4
4 System Support 4
5 Input/Output Interfaces 4
8SYSTEM BIOS 6
A Error Messages and Codes 6
1.4 Notational Conventions 8
Table 1-1 9
Table 1-1 (Continued) 10
Introduction 16
System Overview 17
2.2 Features 18
Table 2-1 19
2.3 System Architecture 20
Power Supply 21
2.3.1 Intel Processor Support 22
2.3.2 Chipset 23
2.3.3 Support Components 24
2.3.4 System Memory 24
2.3.5 Mass Storage 25
2.3.6 Serial Interface 25
2.3.9 Graphics Subsystem 26
2.3.10 Audio Subsystem 26
2.4 Specifications 27
Table 2-8 28
Physical Specifications 28
Table 2-9 29
Optical Drive Specifications 29
Table 2-10 30
Hard Drive Specifications 30
Processor/Memory Subsystem 31
3.2 Intel Processors 32
3.3 Memory Subsystem 34
3.3.1 Memory Upgrading 35
System Support 37
Software/Driver Layer 39
Transaction Protocol Layer 39
4.2.3 Option ROM Mapping 40
4.2.4 PCI Interrupts 40
4.2.6 PCI Connectors 41
PCI Express Connectors 42
4.3 System Resources 43
4.3.2 Direct Memory Access 44
4.4.1 Clearing CMOS 45
4.5 System Management 46
Power-On / Setup Password 47
Setup Password 47
Cable Lock Provision 47
I/O Interface Security 47
Chassis Security 47
4.5.2 Power Management 48
4.5.3 System Status 49
4.6.1 System I/O Map 50
Table 4-9 51
System I/O Map 51
4.6.2 GPIO Functions 52
Input/Output Interfaces 53
5.2 SATA/eSATA Interfaces 54
5.2.2 eSATA interface 55
5.3 Diskette Drive Interface 56
Table 5-3 57
5.4 Serial Interface 58
Table 5-5 60
Table 5-6 62
5.7.1 USB Connector 63
5.7.2 USB Cable Data 64
5.8 Audio Subsystem 65
5.8.1 HD Audio Controller 66
5.8.2 HD Audio Link Bus 66
5.8.3 Audio Multistreaming 66
5.8.4 Audio Specifications 67
5.9.1 Wake-On-LAN Support 69
5.9.4 NIC Connector 70
5.9.5 NIC Specifications 70
Integrated Graphics Subsystem 71
Controller 72
Table 6-1 73
GMA 4500 Memory Allocation 73
6.3 Display Modes 74
6.4 Upgrading 75
6.5 Monitor Connectors 76
6.5.2 DisplayPort Connector 77
Power and Signal Distribution 79
Table 7-1 80
Table 7-2 81
Table 7-3 82
7.2.3 Energy Star Compliancy 83
7.3 Power C on tro l 84
Table 7-5 85
Power LED Indications 85
Power LED Condition 85
7.3.2 Wake Up Events 86
7.3.3 Power Management 87
7.4 Signal Distribution 88
Table 7-7. (Continued) 89
SYSTEM BIOS 91
8.2 ROM Flashing 92
8.3 Boot Functions 93
8.3.4 Boot Error Codes 94
Table 8-2 95
8.4.1 System ID and ROM Type 96
8.4.2 Temperature Status 96
8.5 SMBIOS 97
8.6 USB Legacy Support 98
Error Messages and Codes 102
Table A-2. (Continued) 102
Error Message Probable Cause 102
67xx-xx) 116
(8601-xx) 117

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HP Compaq dc7900 USDT Specifiche Pagina 53

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