Intel DX48BT2 用户手册

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The Desktop Board supports up to 12 USB 2.0 ports (eight ports routed to back panel 
connectors and four ports routed to two onboard headers) via the ICH9R.  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. 

The board’s IDE interface handles the exchange of information between the processor 
and peripheral devices such as hard disk drives and CD-ROM drives.  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 

Desktop Board DX48BT2 supports six onboard Serial ATA channels (3.0 Gb/s) via 
ICH9R and two eSATA channels (3.0 Gb/s) via a discrete controller. 

The six onboard Serial ATA channels provided by ICH9R support the following RAID 
(Redundant Array of Independent Drives) levels: 
•  RAID 0 - data striping 
•  RAID 1 - data mirroring 
•  RAID 0+1 (or RAID 10) - data striping and data mirroring 
•  RAID 5 - distributed parity 
For information on configuring your system for RAID using Intel

®

 Matrix Storage 

Technology see Chapter 4. 

Desktop Board DX48BT2 includes an I/O controller that provides the following legacy 
I/O features: 
•  Consumer Infrared (CIR) support 
•  Low pin count (LPC) interface 
•  Intelligent power management, including a programmable wake up event interface 
•  PCI power management support