Front Panel I/O Connectivity Design Guide

vii
Contents
1 Supporting Documentation
1.1 Online Support ............................................................................................................. 11
1.2 Design Specifications................................................................................................... 12
1.3 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 Introduction .................................................................................................................. 15
2.2 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
2.3 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 Introduction .................................................................................................................. 27
3.2 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
3.3 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