LM89CIM NSC [National Semiconductor], LM89CIM Datasheet - Page 12

• Manufacturer Part Number: LM89CIM
• Manufacturer: NSC [National Semiconductor]

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1.0 Functional Description
FIGURE REGISTER at BFh. The filter can be set according
to the following table.
FIGURE 9. Digital Filter Response in a Pentium 4 processor System. The filter on and off curves were purposely
D2
0
0
1
1
a) Step Response
D1
0
1
0
1
FIGURE 8. Filter Output Response to a Step Input
Filter
No Filter
Level 1
Level 1
Level 2
offset to better show noise performance.
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(Continued)
12
Level 2 sets maximum filtering.
Figure 8 depicts the filter output in response to a step input
and an impulse input. Figure 9 depicts the digital filter in use
in a Pentium 4 processor system. Note that the two curves,
with filter and without, have been purposely offset so that
both responses can be clearly seen. Inserting the filter does
not induce an offset as shown.
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b) Impulse Response
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