Intel® 31244 PCI-X to Serial ATA Controller
7.4.4Embedded Intel® 31244
Figure 18 shows GD31244 as the PCI-X agent in a standalone embedded application (with no PCI-X slot). This figure shows one of the chipset PCI AD lines connected through W1 to the Intel® 31244 PCI-X to Serial ATA Controller. This AD line is also used as an IDSEL line from line segment W2 to a 2 K resistor through W3 to the GD31244 IDSEL line input buffer. Table 23 shows the corresponding wiring rules. These recommended wire lengths should support all PCI-X frequencies. However, prelayout simulation is recommended.
Figure 18. Embedded Intel® 31244 PCI-X to Serial ATA Controller
Design with Single PCI-X Load
| W1 |
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| PCI |
| IDSEL | Agent |
I/O Buffer |
| |
|
| |
| W2 | W3 |
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Table 23. Wiring Lengths for Embedded Intel® 31244
| Lower AD Bus | Upper AD Bus |
| ||
Segment |
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| Units |
| Minimum Length | Maximum Length | Minimum Length | Maximum Length |
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W1 | 2.85 | 10 | 3.85 | 10.25 | inches |
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W2 | 0.1 | 0.2 | N/A | N/A | inches |
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W3 | 1.125 | 1.725 | N/A | N/A | inches |
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Design Guide | 53 |
