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Desktop Board Features
17
Table 5 describes the LED states when the board is powered up and the 10/100/1000 Gigabit
Ethernet LAN subsystem is operating.
Table 5. RJ-45 10/100/1000 Gigabit Ethernet LAN Connector LEDs
LED LED Color LED State Indicates
Left Off LAN link is not established.
Green
On LAN link is established.
Blinking LAN activity is occurring.
N/A Off 10 Mb/s data rate is selected.
Green On 100 Mb/s data rate is selected.
Right
Yellow On 1000 Mb/s data rate is selected.
Hi-Speed USB 2.0 Support
NOTE
Computer systems that have an unshielded cable attached to a USB port might not meet FCC
Class B requirements, even if no device or a low-speed USB device is attached to the cable.
Use a shielded cable that meets the requirements for a full-speed USB device.
The desktop board supports up to eight USB 2.0 ports via the ICH7DH: four ports routed to the
back panel and four routed to two internal USB 2.0 headers. USB 2.0 ports are backward
compatible with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds.
USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer
rates. Disabling Hi-Speed USB in the BIOS reverts all USB 2.0 ports to USB 1.1 operation. This
may be required to accommodate operating systems that do not support USB 2.0.
Enhanced IDE Interface
The ICH7DH’s IDE interface handles the exchange of information between the processor and
peripheral devices like hard disks, CD-ROM drives, and Iomega Zip* drives inside the computer.
The interface supports:
• Up to two IDE devices (such as hard drives)
• ATAPI-style devices (such as CD-ROM drives)
• Older PIO Mode devices
• Ultra DMA-33 and ATA-66/100 protocols
• Laser Servo (LS-120) drives
Serial ATA
The desktop board supports four Serial ATA channels (3.0 Gb/s) via the ICH7DH, connecting one
device per channel.