Front Panel I/O Connectivity Design Guide

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3 Front Panel High Speed Serial Bus
What This Chapter Contains
3.1 Introduction .................................................................................................................. 27
3.2 USB Connectors .......................................................................................................... 27
3.3 IEEE-1394 Connector .................................................................................................. 31
3.1 Introduction
This chapter contains electrical connection information for USB and IEEE 1394 front panel high-
speed serial bus connectors.
3.2 USB Connectors
USB connectors must be compliant with the Universal Serial Bus 2.0 specification.
3.2.1 Usage Model
This design allows for a minimum of two front panel USB connections for access by frequent hot-
plug devices (such as cameras, game controllers, etc.).
3.2.2 Features
The USB front panel can support multiple USB ports that can be routed via a cable to the front
panel. Each 2x5 header supports two USB ports whereby each 1x5 header supports a single USB
port.
USB features include:
• Support for self-identifying peripherals that can be dynamically connected or disconnected
during computer operation (hot plugging)
• Dynamic device enumeration
• Support for isochronous and asynchronous transfer types over the same set of wires
• Support for up to 127 physical devices
• Error-handling and fault-recovery mechanisms built into the protocol