Intel® 31244 PCI-X to Serial ATA Controller
Test Methodology
10.1.2Extended Voltage Mode Driver Model
The extended voltage mode eye diagram for the new slow driver is shown in Figure 26 with the SATA driver mode superimposed. The extended voltage mode eye diagram for the driver is also shown in table format in Table 29.
Figure 26. Extended Mode Driver Example
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(V) |
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Voltage | 0 |
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0 | 100 | 200 | 300 | 400 | 500 | 600 | |
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Time (ps)
old_ideal_S
new_ideal_S
Table 29. | Extended Mode Driver |
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| Vdiff,tx |
| +/- 250 mV differential nominal measured at GD31244 TX pins |
| T,slew |
| 0.3 UI |
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| Tjitter |
| 0 - 0.35 UI max |
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| Trise/fall |
| 0.3 UI |
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| Vmin @ GD31244 pin |
| 800 mV |
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| Vmax @ GD31244 pin |
| 1200 mV |
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Note: The simulation using the maximum driver model with this resistor network shown in Figure 13, resulted in a 50 mV over the specification of 600 mV maximum. It is important to test this overdrive condition and make sure that the actual overdrive condition does not damage the SATA disks.
64 | Design Guide |
