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Table 7-7., System Board Component Designations

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Power and Signal Distribution SW50 XMM1 XMM2 XMM3 XMM4 XU1 XB2 Table 7-7. (Continued) System Board Component Designations Clear CMOS switch Memory slot (black) Memory slot (white) Memory slot (white) Memory slot (white) Processor socket Battery socket Figure 7-6 shows pinouts of headers used on the sytem boards. SFF & CMT only SFF & CMT only Power Button/LED, HD LED Header P5 (USDT, SFF) HD LED + 1 HD LED - 3 GND5 Pwr Btn 7 Chassis ID0 9 GND 11 Therm Diode A 13 2 PS LED + 4 PS LED - 8 GND 10 Chassis ID1 12 NC 14 Therm Diode C Power Button/LED, HD LED Header P5 (CMT) HD LED Cathode 1 HD LED Anode 3 GND5 M Reset 7 +5 VDC 9 NC 11 GND 13 Chassis ID2 15 2 PS LED Cathode 4 PS LED Anode 6 Pwr Btn 8 GND 10 NC 12 GND 16 +5 VDC Chassis ID0 17 18 Chassis ID1 Front Panel Audio Header P23 Mic In Left (Tip) 1 Mic In Right (Sleeve) 3 HP Out Right 5 Sense Send 7 HP Out Left 9 2 Analog GND 4 Front Audio Detect# 6 Sense_1 Return 10 Sense_2 Return Serial Port A Header P54 UART1 DCD- 1 UART1 RX DATA 3 UART1 TX DATA 5 UART1 DTR 7 GND 9 2 UART1 DSR4 UART1 RTS6 UART1 CTS8 UART1 RI10 Comm A Detect- Hood Lock Header P124 Hood Lock 1 2 Coil Conn GND 5 4 +12V 6 Hood Unlock Serial Port B Header P52 UART2 DTR- 1 UART2 CTS- 3 UART2 TX DATA 5 GND 7 +5.0V 9 UART2 RTS- 11 UART2 DCD- 13 +12V 15 2 UART2 RX DATA 4 UART2 DSR6 UART2 RI8 GND 10 +3.3V aux 12 Comm B Detect 14 -12V Hood Sense Header P125 1 Hood SW Detect 2 GND 3 Hood Sensor NOTE: No polarity consideration required for connection to speaker header P6. NC = Not connected Figure 7-6. System Board Header Pinouts Technical Reference Guide www.hp.com 7-11

Section	Page
Title	1
Table of Contents	3
Chapter 1: 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 Special Notices	9
1.5.2 Values	9
1.5.3 Ranges	9
1.6 Common Acronyms and Abbreviations	10
Chapter 2: System Overview	17
2.1 Introduction	17
2.2 Features	18
2.3 System Architecture	20
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 and Parallel Interfaces	25
2.3.7 Universal Serial Bus Interface	25
2.3.8 Network Interface Controller	25
2.3.9 Graphics Subsystem	26
2.3.10 Audio Subsystem	26
2.4 Specifications	27
Chapter 3: Processor/Memory Subsystem	33
3.1 Introduction	33
3.2 Intel Processors	34
3.2.1 Intel Processor Overview	34
3.2.2 Processor Changing/Upgrading	35
3.3 Memory Subsystem	36
3.3.1 Memory Upgrading	37
3.3.2 Memory Mapping and Pre-allocation	37
Chapter 4: System Support	39
4.1 Introduction	39
4.2 PCI Bus Overview	39
4.2.1 PCI 2.3 Bus Operation	39
4.2.2 PCI Express Bus Operation	41
4.2.3 Option ROM Mapping	42
4.2.4 PCI Interrupts	42
4.2.5 PCI Power Management Support	42
4.2.6 PCI Connectors	43
4.3 System Resources	45
4.3.1 Interrupts	45
4.3.2 Direct Memory Access	46
4.4 Real-Time Clock and Configuration Memory	47
4.4.1 Clearing CMOS	47
4.4.2 Standard CMOS Locations	48
4.5 System Management	48
4.5.1 Security Functions	48
4.5.2 Power Management	50
4.5.3 System Status	51
4.5.4 Thermal Sensing and Cooling	51
4.6 Register Map and Miscellaneous Functions	52
4.6.1 System I/O Map	52
4.6.2 GPIO Functions	53
Chapter 5: Input/Output Interfaces	55
5.1 Introduction	55
5.2 SATA Interface	56
5.3 PATA Interface	57
5.4 Diskette Drive Interface	58
5.5 Serial Interface	60
5.6 Parallel Interface	61
5.6.1 Standard Parallel Port Mode	61
5.6.2 Enhanced Parallel Port Mode	61
5.6.3 Extended Capabilities Port Mode	61
5.6.4 Parallel Interface Connector	62
5.7 Keyboard/Pointing Device Interface	63
5.7.1 Keyboard Interface Operation	63
5.7.2 Pointing Device Interface Operation	64
5.7.3 Keyboard/Pointing Device Interface Connector	64
5.8 Universal Serial Bus Interface	65
5.8.1 USB Connector	65
5.8.2 USB Cable Data	66
5.9 Audio Subsystem	67
5.9.1 HD Audio Controller	68
5.9.2 HD Audio Link Bus	68
5.9.3 Audio Multistreaming	68
5.9.4 Audio Specifications	69
5.10 Network Interface Controller	70
5.10.1 Wake-On-LAN Support	71
5.10.2 Alert Standard Format Support	71
5.10.3 Power Management Support	71
5.10.4 NIC Connector	72
5.10.5 NIC Specifications	72
Chapter 6: Integrated Graphics	73
6.1 Introduction	73
6.2 Functional Description	74
6.3 Display Modes	76
6.4 Upgrading	77
6.5 Monitor Connectors	78
6.5.1 Analog Monitor Connector	78
6.5.2 Digital Monitor Connector	79
Chapter 7: Power and Signal Distribution	81
7.1 Introduction	81
7.2 Power Distribution	81
7.2.1 USDT Power Distribution	81
7.2.2 SFF Power Distribution	82
7.2.3 CMT Power Distribution	84
7.2.4 Energy Star Compliancy	85
7.3 Power Control	86
7.3.1 Power Button	86
7.3.2 Wake Up Events	88
7.3.3 Power Management	89
7.4 Signal Distribution	90
Chapter 8: System BIOS	93
8.1 Introduction	93
8.2 ROM Flashing	94
8.2.1 Upgrading	94
8.2.2 Changeable Splash Screen	94
8.3 Boot Functions	95
8.3.1 Boot Device Order	95
8.3.2 Network Boot (F12) Support	95
8.3.3 Memory Detection and Configuration	95
8.3.4 Boot Error Codes	96
8.4 Client Management Functions	97
8.4.1 System ID and ROM Type	98
8.4.2 Temperature Status	98
8.4.3 Drive Fault Prediction	98
8.5 SMBIOS	99
8.6 USB Legacy Support	100
8.7 Management Engine Functions	100

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Technical Reference Guide

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7-11

Power and Signal Distribution

Figure 7-6 shows pinouts of headers used on the sytem boards.

NOTE:

No polarity consideration required for connection to speaker header P6.

NC = Not connected

Figure 7-6.

System Board Header Pinouts

SW50

Clear CMOS switch

XMM1

Memory slot (black)

XMM2

Memory slot (white)

XMM3

Memory slot (white)

SFF & CMT only

XMM4

Memory slot (white)

SFF & CMT only

XU1

Processor socket

XB2

Battery socket

Table 7-7.

(Continued)

System Board Component Designations

UART1 RX DATA 3

UART1 TX DATA 5

UART1 DTR 7

GND 9

4 UART1 RTS-

8 UART1 RI-

6 UART1 CTS-

10 Comm A Detect-

Serial Port A

Header P54

UART1 DCD- 1

2 UART1 DSR-

UART2 DTR- 1

UART2 CTS- 3

UART2 TX DATA 5

GND 7

+5.0V 9

2 UART2 RX DATA

4 UART2 DSR-

8 GND

6 UART2 RI-

10 +3.3V aux

UART2 RTS- 11

UART2 DCD- 13

12 Comm B Detect

+12V 15

14 -12V

Serial Port B

Header P52

Hood Lock 1

GND 5

2 Coil Conn

4 +12V

6 Hood Unlock

Hood Lock

Header P124

1 Hood SW Detect

2 GND

3 Hood Sensor

Hood Sense

Header P125

HD LED + 1

HD LED - 3

GND5

2 PS LED +

4 PS LED -

8 GND

Pwr Btn 7

GND 11

Therm Diode A 13

12 NC

Chassis ID0 9

14 Therm Diode C

Power Button/LED, HD LED

Header P5 (USDT, SFF)

10 Chassis ID1

HD LED Cathode 1

HD LED Anode 3

GND5

M Reset 7

+5 VDC 9

2 PS LED Cathode

4 PS LED Anode

8 GND

6 Pwr Btn

10 NC

NC 11

GND 13

12 GND

Chassis ID2 15

16 +5 VDC

Power Button/LED, HD LED

Header P5 (CMT)

18 Chassis ID1

Chassis ID0 17

Mic In Right (Sleeve) 3

HP Out Right 5

Sense Send 7

HP Out Left 9

4 Front Audio Detect#

6 Sense_1 Return

10 Sense_2 Return

Front Panel Audio

Header P23

Mic In Left (Tip) 1

2 Analog GND