Dual-Core Intel® Xeon® Processor LV and Intel
®
3100 Chipset
January 2007
User’s Manual
Order Number: 315879-002
19
Product Description
1.4.4
Rear Panel I/O Connectors
1.4.4.1
Serial COM ports
The CRB provides two Serial COM Ports.
• 9-pin male D-sub connectors
• COM1 port (closest to PS/2 ports on left, when looking at the back panel) and
COM2 port (closest to the USB ports)
1.4.4.2
PS2 Mouse and Keyboard Connectors
The CRB has two stacked circular DIN PS2 connectors. Turn off power before a
keyboard or mouse is connected or disconnected.
• One for the keyboard (bottom)
• One for the mouse (top)
1.4.4.3
USB Ports
The rear panel provides two dual-stacked USB 2.0 ports. They cannot be run in both
modes simultaneously. Internal logic determines which interface is used.
• Total of four USB 2.0 ports
• Two USB modes
— UHCI
— EHCI
• Two Universal Host Controller Interfaces (USB 1.1)
— Two ports for each controller
— Accessible by I/O space
— Running voltage requirement: 3.3V
• One Enhanced Host Controller Interface (USB 2.0)
— Four ports
— Accessible by memory space
— Running voltage requirement: 400mV
Figure 11.
Rear Panel I/O Connectors
