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HP Dc7700 HP Compaq dx7300 and dc7700 Business PC Technical Reference Guide, 1 - Page 105

Audio Subsystem, Mic In, Line In, Headphones Out, Line Out

UPC - 882780715318

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Input/Output Interfaces 5.8 Audio Subsystem These systems use the HD audio controller of the 82801 component to access and control a Realtek ALC262 HD Audio Codec, which provides 2-channel high definition analog-to-digital (ADC) and digital-to-analog (DAC) conversions. A block diagram of the audio subsystem is shown in Figure 5-10. All control functions such as volume, audio source selection, and sampling rate are controlled through software through the HD Audio Interface of the 82801 ICH component. Control data and digital audio streams (record and playback) are transferred between the ICH and the Audio Codec over the HD Audio Interface. The codec's speaker output is applied to a 1.5-watt amplifier that drives the internal speaker. A device plugged into the Headphone jack or the line input jack is sensed by the system, which will inhibit the Speaker Audio signal. Theses systems provide the following analog interfaces for external audio devices: Mic In-This input uses a three-conductor mini-jack that accepts a stereo microphone. This is the default recording input after a system reset. On MT/CMT systems with both front and rear microphone jacks, either jack is available for use (but not simultaneously). Line In-This input uses a three-conductor (stereo) mini-jack that is specifically designed for connection of a high-impedance audio source such as a tape deck. Headphones Out-This input uses a three-conductor (stereo) mini-jack that is designed for connecting a set of 32-ohm (nom.) stereo headphones. Plugging into the Headphones jack mutes the signal to the internal speaker and the Line Out jack as well. Line Out-This output uses a three-conductor (stereo) mini-jack for connecting left and right channel line-level signals. Typical connections include a tape recorder's Line In (Record In) jacks, an amplifier's Line In jacks, or to powered speakers that contain amplifiers. 82801 ICH HD Audio Interface PC Beep HD Audio I/F Line In Front Panel Mic In Line Audio (L/R) Header P23 Mic Audio (L/R) Rear Panel Mic In [1] Mic Audio (L/R) Header P11 [2] Aux Audio In Audio In (L/R) Speaker Audio (mono) Audio Amp Header P6 ALC262 HD Audio Codec Header Headphone P23 Audio (L/R) Headphones Out Line Audio Out (L/R) Line Out NOTES: L/R = Separate left and right channels (stereo). L+R = Combined left and right channels (mono). [1] MT/CMT only [2] SSF, ST, MT, and CMT only. Figure 5-10. Audio Subsystem Functional Block Diagram Technical Reference Guide www.hp.com 5-27

Section	Page
Title	1
Contents	3
Chap_1_Introduction_final_review.pdf	7
Introduction	7
1.1 About this Guide	7
1.1.1 Online Viewing	7
1.1.2 Hardcopy	7
1.2 Additional Information Sources	7
1.3 Model Numbering Convention	7
1.4 Serial Number	9
1.5 Notational Conventions	9
1.5.1 Values	9
1.5.2 Ranges	9
1.5.3 Register Notation and Usage	9
1.5.4 Bit Notation and Byte Values	9
1.6 Common Acronyms and Abbreviations	10
Chap_2_System_Overview_final.pdf	17
System Overview	17
2.1 Introduction	17
2.2 Features	18
2.3 Mechanical Design	20
2.3.1 Cabinet Layouts	21
2.3.2 Chassis Layouts	26
2.3.3 Board Layouts	30
2.4 System Architecture	33
2.4.1 Intel Processor Support	35
2.4.2 Chipset	36
2.4.3 Support Components	37
2.4.4 System Memory	37
2.4.5 Mass Storage	38
2.4.6 Serial and Parallel Interfaces	38
2.4.7 Universal Serial Bus Interface	38
2.4.8 Network Interface Controller	38
2.4.9 Graphics Subsystem	39
2.4.10 Audio Subsystem	39
2.5 Specifications	40
Chap_3_Processor_final_review.pdf	45
Processor/Memory Subsystem	45
3.1 Introduction	45
3.2 Intel Pentium Processors	46
3.2.1 Intel Processor Overview	46
3.2.2 Processor Upgrading	48
3.3 Memory Subsystem	48
Chap_4_System_Support_final_review.pdf	53
System Support	53
4.1 Introduction	53
4.2 PCI Bus Overview	53
4.2.1 PCI 2.3 Bus Operation	54
4.2.2 PCI Express Bus Operation	58
4.2.3 Option ROM Mapping	60
4.2.4 PCI Interrupts	60
4.2.5 PCI Power Management Support	60
4.2.6 PCI Connectors	61
4.3 System Resources	63
4.3.1 Interrupts	63
4.3.2 Direct Memory Access	68
4.4 Real-Time Clock and Configuration Memory	71
4.4.1 Clearing CMOS	71
4.4.2 Standard CMOS Locations	72
4.5 System Management	72
4.5.1 Security Functions	72
4.5.2 Power Management	74
4.5.3 System Status	75
4.5.4 Thermal Sensing and Cooling	75
4.6 Register Map and Miscellaneous Functions	76
4.6.1 System I/O Map	76
4.6.2 SCH5317 I/O Controller Functions	77
Chap_5_Input-Output_Interfaces_final_review.pdf	79
Input/Output Interfaces	79
5.1 Introduction	79
5.2 SATA Interfaces	79
5.2.1 SATA Programming	79
5.2.2 SATA Connector	81
5.2.3 RAID Functionality	81
5.3 Diskette Drive Interface	82
5.3.1 Diskette Drive Programming	82
5.3.2 Diskette Drive Connector	86
5.4 Serial Interface	87
5.4.1 Serial Connector	87
5.4.2 Serial Interface Programming	87
5.5 Parallel Interface	89
5.5.1 Standard Parallel Port Mode	89
5.5.2 Enhanced Parallel Port Mode	89
5.5.3 Extended Capabilities Port Mode	90
5.5.4 Parallel Interface Programming	90
5.5.5 Parallel Interface Connector	92
5.6 Keyboard/Pointing Device Interface	93
5.6.1 Keyboard Interface Operation	93
5.6.2 Pointing Device Interface Operation	95
5.6.3 Keyboard/Pointing Device Interface Programming	95
5.6.4 Keyboard/Pointing Device Interface Connector	99
5.7 Universal Serial Bus Interface	100
5.7.1 USB Data Formats	101
5.7.2 USB Programming	102
5.7.3 USB Connector	103
5.7.4 USB Cable Data	104
5.8 Audio Subsystem	105
5.8.1 HD Audio Controller	106
5.8.2 HD Audio Interface	106
5.8.3 HD Audio Codec	107
5.8.4 Audio Programming	108
5.8.5 Audio Specifications	110
5.9 Network Interface Controller	111
5.9.1 Wake-On-LAN Support	112
5.9.2 Alert Standard Format Support	112
5.9.3 Power Management Support	112
5.9.4 NIC Programming	113
5.9.5 NIC Connector	113
5.9.6 NIC Specifications	114
Chap_6_Integrated_Graphics_final_review.pdf	115
Integrated Graphics Subsystem	115
6.1 Introduction	115
6.2 Functional Description	116
6.3 Display Modes	118
6.4 Upgrading Graphics	119
6.5 VGA Monitor Connector	120
Chap_7_Power_and_Signal_final_review.pdf	121
Power and Signal Distribution	121
7.1 Introduction	121
7.2 Power Supply Assembly/Control	121
7.2.1 Power Supply Assembly	122
7.2.2 Power Control	124
7.2.3 Power Management	127
7.3 Power Distribution	128
7.4 Signal Distribution	131
Chap_8_BIOS_ROM_final_review.pdf	135
BIOS ROM	135
8.1 Introduction	135
8.2 ROM Flashing	136
8.2.1 Upgrading	136
8.2.2 Changeable Splash Screen	137
8.3 Boot Functions	137
8.3.1 Boot Device Order	137
8.3.2 Network Boot (F12) Support	138
8.3.3 Memory Detection and Configuration	138
8.3.4 Boot Error Codes	139
8.4 Setup Utility	140
8.5 Client Management Functions	149
8.5.1 System ID and ROM Type	150
8.5.2 Temperature Status	150
8.5.3 Drive Fault Prediction	150
8.6 SMBIOS	151
8.7 USB Legacy Support	151
App_A_Error_Messages__amp__Codes_final_review.pdf	153
A.1 Introduction	153
A.2 Beep/Power LED Codes	153
A.3 Power-On Self Test (POST) Messages	154
A.4 System Error Messages (1xx-xx)	157
A.5 Memory Error Messages (2xx-xx)	158
A.6 Keyboard Error Messages (30x-xx)	159
A.7 Printer Error Messages (4xx-xx)	160
A.8 Video (Graphics) Error Messages (5xx-xx)	160
A.9 Diskette Drive Error Messages (6xx-xx)	161
A.10 Serial Interface Error Messages (11xx-xx)	162
A.11 Modem Communications Error Messages (12xx-xx)	163
A.12 System Status Error Messages (16xx-xx)	164
A.13 Hard Drive Error Messages (17xx-xx)	165
A.14 Hard Drive Error Messages (19xx-xx)	167
A.15 Video (Graphics) Error Messages (24xx-xx)	168
A.16 Audio Error Messages (3206-xx)	168
A.17 DVD/CD-ROM Error Messages (33xx-xx)	169
A.18 Network Interface Error Messages (60xx-xx)	169
A.19 SCSI Interface Error Messages (65xx-xx, 66xx-xx, 67xx-xx)	170
A.20 Pointing Device Interface Error Messages (8601-xx)	171
App_B_ASCII_Character_Set_final_review.pdf	173
B.1 Introduction	173
App_C_Keyboard_final_review.pdf	177
C.1 Introduction	177
C.2 Keystroke Processing	177
C.2.1 PS/2-Type Keyboard Transmissions	179
C.2.2 USB-Type Keyboard Transmissions	180
C.2.3 Keyboard Layouts	180
C.2.4 Keys	183
C.2.5 Keyboard Commands	186
C.2.6 Scan Codes	187
C.3 Connectors	193

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Technical Reference Guide

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5-27

Input/Output Interfaces

5.8 Audio Subsystem

These systems use the HD audio controller of the 82801 component to access and control a

Realtek ALC262 HD Audio Codec, which provides 2-channel high definition analog-to-digital

(ADC) and digital-to-analog (DAC) conversions. A block diagram of the audio subsystem is

shown in Figure 5-10. All control functions such as volume, audio source selection, and

sampling rate are controlled through software through the HD Audio Interface of the 82801 ICH

component. Control data and digital audio streams (record and playback) are transferred between

the ICH and the Audio Codec over the HD Audio Interface. The codec’s speaker output is

applied to a 1.5-watt amplifier that drives the internal speaker. A device plugged into the

Headphone jack or the line input jack is sensed by the system, which will inhibit the Speaker

Audio signal.

Theses systems provide the following analog interfaces for external audio devices:

Mic In

—This input uses a three-conductor mini-jack that accepts a stereo microphone. This is

the default recording input after a system reset. On MT/CMT systems with both front and rear

microphone jacks, either jack is available for use (but not simultaneously).

Line In

—This input uses a three-conductor (stereo) mini-jack that is specifically designed for

connection of a high-impedance audio source such as a tape deck.

Headphones Out

—This input uses a three-conductor (stereo) mini-jack that is designed for

connecting a set of 32-ohm (nom.) stereo headphones. Plugging into the Headphones jack mutes

the signal to the internal speaker and the Line Out jack as well.

Line Out

—This output uses a three-conductor (stereo) mini-jack for connecting left and right

channel line-level signals. Typical connections include a tape recorder's Line In (Record In)

jacks, an amplifier's Line In jacks, or to powered speakers that contain amplifiers.

Figure 5-10.

Audio Subsystem Functional Block Diagram

82801 ICH

HD Audio

Interface

Headphone

Aux Audio In

Mic In

Line In

Audio (L/R)

Header

Audio In (L/R)

HD Audio

Codec

ALC262

Speaker

Audio (mono)

Header

Line Audio (L/R)

Rear Panel

NOTES:

L/R = Separate left and right channels (stereo). L+R = Combined left and right channels (mono).

P23

P11 [2]

Audio

Amp

HD Audio I/F

Front Panel

Mic In [1]

Headphones

Out

Mic Audio (L/R)

[1] MT/CMT only

PC Beep

Header

P23

[2] SSF, ST, MT, and CMT only.

Out (L/R)

Line Audio

Line Out

Mic Audio (L/R)