7.2.3.1Embedded Intel® 31154 133 MHz PCI Bridge Application at 66 MHz
Figure 14 shows an 31154 in a stand-alone embedded application. In this application the 31154 is shown driving four loads. Additional loads might be possible with careful simulation. Table 19 shows the corresponding wiring lengths to use as a reference.
Figure 14. Embedded Intel® 31154 133 MHz PCI Bridge Wiring for 66 MHz
| W1 | W2 |
|
| PCI Agent 1 |
I/O Buffer | IDSEL |
|
|
| |
| W3 | W4 |
| W5 | W6 |
|
| PCI Agent 2 |
| W7 | W8 |
|
| PCI Agent 3 |
| W9 | W10 |
|
| PCI Agent 4 |
|
|
Table 19. | Wiring Lengths for Embedded 66 MHz Design |
|
| |||
|
|
|
|
|
|
|
|
| Lower AD Bus | Upper AD Bus |
| ||
| Segment |
|
|
|
| Units |
|
| Minimum Length | Maximum Length | Minimum Length | Maximum Length |
|
|
|
|
|
|
|
|
| W1 | 5 | 7 | 5 | 7 | inches |
|
|
|
|
|
|
|
| W2 | 0.75 | 1.5 | 1.75 | 2.75 | inches |
|
|
|
|
|
|
|
| W3 | 0.1 | 0.1 | – | – | inches |
|
|
|
|
|
|
|
| W4 | 1.725 | 1.725 | – | – | inches |
|
|
|
|
|
|
|
| W5 | 1 | 1 | 1 | 1 | inches |
|
|
|
|
|
|
|
| W6 | 0.75 | 1.5 | 1.75 | 2.75 | inches |
|
|
|
|
|
|
|
| W7 | 1 | 1 | 1 | 1 | inches |
|
|
|
|
|
|
|
| W8 | 0.75 | 1.5 | 1.75 | 2.75 | inches |
|
|
|
|
|
|
|
| W9 | 1 | 1 | 1 | 1 | inches |
|
|
|
|
|
|
|
| W10 | 0.75 | 1.5 | 1.75 | 2.75 | inches |
|
|
|
|
|
|
|
Intel® 31154 133 MHz PCI Bridge Design Guide Design Guide | 51 |