This guide describes connection and mechanical recommendations for all main boards having
internal connectors requiring external connection. Recommendations include (among others):
front panel I/O header pin-out definition, chassis I/O aperture size, I/O interface board dimensions
and motherboard to front panel board I/O cable shielding and size. Front panel I/O legacy
connectors, internal legacy and legacy-free connectors are also addressed. Specific to front panel
I/O the goal is for any particular setup of main board, interface board, interface cable and chassis
that meets the pinout and physical dimension recommendations of this design guide will be
physically compatible with another setup that also meets the requirements of this design guide.
Environmental and electrical compatibility testing should be conducted for all designs arising from
use of this design guide.
Author(s): intel
Edition: 1.3
Publisher: intel
Year: 2005
Language: English
Pages: 72
1 Supporting Documentation
1.1
1.2
1.3
Online Support ............................................................................................................. 11
Design Specifications................................................................................................... 12
Recommended Roles of Suppliers............................................................................... 14
1.3.1
Chassis Supplier............................................................................................ 14
1.3.2
Motherboard Manufacturer or Chassis Supplier............................................ 14
1.3.3
Third-Party Interface Board Supplier ............................................................. 14
2 Front Panel Legacy I/O
2.1
2.2
2.3
Introduction .................................................................................................................. 15
Switch/LED and IR Connectors.................................................................................... 15
2.2.1
Usage Models................................................................................................ 15
2.2.2
Switch/LED Connector Features ................................................................... 16
2.2.3
IR Connector Features .................................................................................. 17
2.2.4
Header Design............................................................................................... 17
2.2.5
Pin Assignments............................................................................................ 18
Front Panel Audio ........................................................................................................ 19
2.3.1
Usage Model ................................................................................................. 19
2.3.2
Features ........................................................................................................ 19
2.3.3
Audio Design Considerations ........................................................................ 19
2.3.4
AC’97 Audio................................................................................................... 19
®
2.3.5
Intel High Definition Audio ............................................................................ 22
3 Front Panel High Speed Serial Bus
3.1
3.2
3.3
Introduction .................................................................................................................. 27
USB Connectors .......................................................................................................... 27
3.2.1
Usage Model ................................................................................................. 27
3.2.2
Features ........................................................................................................ 27
3.2.3
Dual Port USB Header .................................................................................. 28
3.2.4
Dual Port USB Header Pin Assignments....................................................... 28
3.2.5
Single Port USB Header................................................................................ 28
3.2.6
Single Port USB Header Pin Assignments .................................................... 29
3.2.7
Dual USB Header Usage............................................................................... 29
3.2.8
Electrical Considerations ............................................................................... 29
IEEE-1394 Connector .................................................................................................. 31
3.3.1
Usage Model ................................................................................................. 31
3.3.2
Features ........................................................................................................ 31
3.3.3
1394 Header Design...................................................................................... 32
3.3.4
Pin Assignments............................................................................................ 32
4 Cabling Design Guidelines
4.1
4.2
4.3
4.4
4.5
Introduction .................................................................................................................. 35
Switch/LED Cable ........................................................................................................ 35
Front Panel Audio Cable .............................................................................................. 36
4.3.1
Introduction.................................................................................................... 36
4.3.2
Cable Drawings ............................................................................................. 36
USB Cabling (Motherboard to I/O Interface Board) ..................................................... 39
4.4.1
Introduction.................................................................................................... 39
4.4.2
Cable Drawings ............................................................................................. 39
IEEE1394 Cabling (Motherboard to I/O Interface Board)............................................. 43
4.5.1
Introduction.................................................................................................... 43
4.5.2
Cable Drawings ............................................................................................. 44
5 Interface Board Design Guidelines
5.1
5.2
Introduction .................................................................................................................. 49
Front Panel I/O Interface Board Dimensions ............................................................... 51
6 Chassis and I/O Shield Guidelines
6.1
6.2
6.3
Introduction .................................................................................................................. 53
Front Panel I/O Board Placement ................................................................................ 53
Front Panel I/O Reference Designs ............................................................................. 56
6.3.1
I/O Shield Reference Design ......................................................................... 56
6.3.2
Housing Reference Design............................................................................ 58
6.3.3
Housing and Shield Assembly Reference Design ......................................... 59
6.3.4
Supporting Structure Reference Design........................................................ 60
6.3.5
Supporting Structure and Shield Reference Design...................................... 61
7 Internal Legacy Connectors (Reference)
7.1
7.2
7.3
Introduction .................................................................................................................. 63
Serial-WHQL Debug Connector................................................................................... 63
7.2.1
Header Design............................................................................................... 63
7.2.2
Pin Assignments............................................................................................ 64
Parallel Port Connectors .............................................................................................. 64
7.3.1
Rear Panel Connector ................................................................................... 64
7.3.2
Stake-Pin Connector ..................................................................................... 66
8 Internal Legacy-Free Connectors (Reference)
8.1 Introduction .................................................................................................................. 67
8.2 LPC (Low Pin Count) Debug Connector ...................................................................... 67
8.2.1
Usage Model ................................................................................................. 67
8.2.2
Features ........................................................................................................ 68
8.2.3
Header Design............................................................................................... 69
8.2.4
Pin Assignments............................................................................................ 71
8.2.5
LPC Debug Connector Pin Assignments....................................................... 72
