Intel 31244 PCI-X User Manual
64
Test Methodology
10.1.2
Extended Voltage Mode Driver Model
with the
SATA driver mode superimposed. The extended voltage mode eye diagram for the driver is also
shown in table format in
shown in table format in
.
Note:
The simulation using the maximum driver model with this resistor network shown in
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.
overdrive condition and make sure that the actual overdrive condition does not damage the SATA
disks.
Figure 26.
Extended Mode Driver Example
Table 29.
Extended Mode Driver
Parameter
Value
V
diff,tx
+/- 250 mV differential nominal measured at GD31244
TX pins
T,slew
0.3 UI -0.41 UI
Tjitter
0 - 0.35 UI max
Trise/fall (20-80%)
0.3 UI -0.41 UI
Vmin @ GD31244 pin
800 mV
Vmax @ GD31244 pin
1200 mV
B0429-01
0.3
0.2
0.1
100
0
200
300
400
500
600
-0.2
-0.1
-0.3
0
Voltage (V)
Time (ps)
old_ideal_S
new_ideal_S