AN4506 Просмотр технического описания (PDF) - STMicroelectronics
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AN4506 Datasheet PDF : 47 Pages
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Digital filters
HPen
0
1
AN4506
Table 10. IG_SEL configuration settings
IG_Sel1
IG_Sel2
Description
1
x
Low-pass-filtered data are used for interrupt
generation
1
x
High-pass and low-pass-filtered data are
used for interrupt generation
4.2
Low-pass filters
The bandwidth of the low-pass filters depends on the selected ODR. The cutoff frequencies
(ft) for the low-pass filters are shown in Table 13.
Low_ODR
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
Table 11. Low-pass filter cutoff frequency
DR [1:0]
BW [1:0]
ODR [Hz]
Cutoff LPF1
[Hz]
00
00
12.5
00
01
12.5
3.9
00
10
12.5
00
11
12.5
01
00
25
01
01
25
7.8
01
10
25
01
11
25
1x
00
50
1x
01
50
16
1x
10
50
1x
11
50
00
00
100
00
01
100
32
00
10
100
00
11
100
01
00
200
01
01
200
63.3
01
10
200
01
11
200
10
00
400
10
01
400
128
10
10
400
10
11
400
Cutoff LPF2
[Hz]
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
n.a.
16.6
16.6
16.6
16.6
12.5
25
25
25
12.5
-
-
70
20
25
50
110
18/47
DocID026442 Rev 2
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