Intel BLKD201GLY2A Product Specification - Page 18

IDE Support

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Intel Desktop Board D201GLY2 Technical Product Specification 1.5.3 IDE Support The board provides three IDE interface connectors: • One parallel ATA IDE connector that supports two devices • Two serial ATA IDE connectors that support one device per connector 1.5.3.1 Parallel ATA IDE Interface The D201GLY2 board 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 SiS964'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. For information about The location of the Parallel ATA IDE connector Refer to Figure 8, page 38 1.5.3.2 Serial ATA Interfaces The board's Serial ATA controller offers two independent Serial ATA ports with a theoretical maximum transfer rate of 1.5 Gbits/sec per port. One device can be installed on each port for a maximum of two 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 operating system. 18

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Intel Desktop Board D201GLY2 Technical Product Specification
18
1.5.3
IDE Support
The board provides three IDE interface connectors:
•
One parallel ATA IDE connector that supports two devices
•
Two serial ATA IDE connectors that support one device per connector
1.5.3.1
Parallel ATA IDE Interface
The D201GLY2 board 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 SiS964’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.
For information about
Refer to
The location of the Parallel ATA IDE connector
Figure 8, page 38
1.5.3.2
Serial ATA Interfaces
The board’s Serial ATA controller offers two independent Serial ATA ports with a
theoretical maximum transfer rate of 1.5 Gbits/sec per port.
One device can be
installed on each port for a maximum of two 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
operating system.