SCA3000 Series
Initial values for registers MD_X_TH, MD_Y_TH and MD_Z_TH vary with SCA3000 product types.
Initial value is:
•
•
•
10h for SCA3000-D01, SCA3000-D02, SCA3000-E01 and SCA3000-E02
08h for SCA3000-E04, SCA3000-E05 and SCA3000-L01
1Bh for SCA3000-D03
The bit level descriptions for registers MD_X_TH, MD_Y_TH and MD_Z_TH are presented in,
Table 13 ...Table 18 below. The threshold levels are in unsigned format and they are absolute
values for the acceleration that triggers the motion detector interrupt. Values presented below are
typical threshold values and they are not factory calibrated.
Table 13. Bit level description for motion detector typical threshold levels (SCA3000-D01 and
SCA3000-D02).
Typical bit weights
Bit number
B7
B6
B5
B4
B3
B2
B1
B0
50
SCA3000-D01, -D02
Acceleration [mg]
MD_X_TH, MD_TH_Z
SCA3000-D01, -D02
Acceleration [mg]
x
x
1300 650
350
200
100
x
1750 850
450
250
150
100
50
MD_Y_TH
x = not used bit
Table 14. Bit level description for motion detector typical threshold levels (SCA3000-D03).
Typical bit weights
Bit number
B7
B6
B5
B4
B3
B2
B1
B0
SCA3000-D03
Acceleration [mg]
MD_X_TH, MD_TH_Z
SCA3000-D03
x
x
800
400
200
120
60
30
Acceleration [mg]
x
1000 500
250
150
90
60
30
MD_Y_TH
x = not used bit
Table 15. Bit level description for motion detector typical threshold levels (SCA3000-E01 and
SCA3000-E02).
Typical bit weights
Bit number
B7
B6
B5
B4
B3
B2
B1
B0
SCA3000-E01, -E02
Acceleration [mg]
MD_X_TH, MD_TH_Z
SCA3000-E01, -E02
Acceleration [mg]
x
x
2050 1050 550
300
150
100
x
2700 1350 700
350
200
100
50
MD_Y_TH
x = not used bit
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PRELIMINARY - Subject to changes
Doc.Nr. 8257300A.06
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Rev.A.06
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