Intel D925XHY D925XHY Technical Product Specification - Page 22

Parallel ATE IDE Interface, 5.2.2, Serial ATA Interfaces - driver

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Intel Desktop Board D925XHY Technical Product Specification 1.5.2.1 Parallel ATE IDE Interface The ICH6-R's Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface. The Parallel ATA IDE interface supports the following modes: • Programmed I/O (PIO): processor controls data transfer. • 8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec. • Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 33 MB/sec. • ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 66 MB/sec. ATA-66 protocol is similar to Ultra DMA and is device driver compatible. • ATA-100: DMA protocol on IDE bus allows host and target throttling. The ICH6-R's ATA-100 logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec. NOTE ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections, noise, and inductive coupling. The Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives) and ATA devices using the transfer modes. The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. The drive reports the transfer rate and translation mode to the BIOS. For information about The location of the Parallel ATA IDE connector Refer to Figure 16, page 52 1.5.2.2 Serial ATA Interfaces The ICH6-R's Serial ATA controller offers four independent Serial ATA ports with a theoretical maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a maximum of four Serial ATA devices. A point-to-point interface is used for host to device connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices per channel. For compatibility, the underlying Serial ATA functionality is transparent to the operating system. The Serial ATA controller can operate in both legacy and native modes. In legacy mode, standard IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI Conventional bus resource steering is used. Native mode is the preferred mode for configurations using the Windows* XP and Windows 2000 operating systems. 22

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Intel Desktop Board D925XHY Technical Product Specification
22
1.5.2.1
Parallel ATE IDE Interface
The ICH6-R’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface.
The Parallel ATA IDE interface supports the following modes:
•
Programmed I/O (PIO):
processor controls data transfer.
•
8237-style DMA:
DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.
•
Ultra DMA:
DMA protocol on IDE bus supporting host and target throttling and transfer rates
of up to 33 MB/sec.
•
ATA-66:
DMA protocol on IDE bus supporting host and target throttling and transfer rates of
up to 66 MB/sec.
ATA-66 protocol is similar to Ultra DMA and is device driver compatible.
•
ATA-100:
DMA protocol on IDE bus allows host and target throttling.
The ICH6-R’s
ATA-100 logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to
88 MB/sec.
±
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives) and ATA
devices using the transfer modes.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS)
translation modes.
The drive reports the transfer rate and translation mode to the BIOS.
For information about
Refer to
The location of the Parallel ATA IDE connector
Figure 16, page 52
1.5.2.2
Serial ATA Interfaces
The ICH6-R’s Serial ATA controller offers four independent Serial ATA ports with a theoretical
maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a
maximum of four Serial ATA devices.
A point-to-point interface is used for host to device
connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices
per channel.
For compatibility, the underlying Serial ATA functionality is transparent to the operating system.
The Serial ATA controller can operate in both legacy and native modes.
In legacy mode, standard
IDE I/O and IRQ resources are assigned (IRQ 14 and 15).
In Native mode, standard PCI
Conventional bus resource steering is used.
Native mode is the preferred mode for configurations
using the Windows* XP and Windows 2000 operating systems.