W83L771ASG Datasheet, PDF (15/28 Pages) Nuvotem Talema – W83L771AWG W83L771ASG Nuvoton H/W Monitoring IC

W83L771AWG/W83L771ASG
7.6 Digital Filter
The W83L771AWG/ASG provides three Digital Filter levels to suppress erroneous remote temperature
readings due to noise. The register address to set the digital filter is at Filter and Alert Configure
Register. If set bits <D2, D1> = <0, 0>, then no filter is selected. If set bits <D2, D1> = <0, 1> or <1, 0>,
then filter level 1 is selected. If set bits <D2, D1> = <1, 1>, then level 2 is selected. Figure 7.6.1 shows
the step response of reading remote temperature with different filter level, and Figure 7.6.2 shows the
impulse response.
5
0
4
5
4
0
3
5
3
0
2
50
5
1
0
1
5
2
0
2
5
SAMPLE NUMBER
No Filter Level
Filter Level 1
Filter Level 2
Figure 7.6.1 Step Response of reading remote temperature
5
0
4
5
4
0
3
5
3
0
2
50
5
1
0
1
5
2
0
2
5
SAMPLE NUMBER
No Filter Level
Filter Level 1
Filter Level 2
Figure 7.6.2 Impulse Response of reading remote temperature
- 12 -
Publication Release Date: 2009/11/19
Version: 1.91