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ST25R3916 데이터시트(PDF) 129 Page - STMicroelectronics

부품명 ST25R3916
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ST25R3916 데이터시트(HTML) 129 Page - STMicroelectronics

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DS12484 Rev 4
129/157
ST25R3916/7
Application information
156
4.5.68
Amplitude measurement configuration register
Register space: A
Address: 33h
Type: RW
4.5.69
Amplitude measurement reference register
Register space: A
Address: 34h
Type: RW
Table 105. Amplitude measurement configuration register
Bit
Name
Default
Function
Comments
7
am_d3
0
Definition of ∆am (difference vs.
reference that triggers interrupt)
-
6
am_d2
0
5
am_d1
0
4
am_d0
0
3am_aam
0
0: Exclude the IRQ measurement
1: Include the IRQ measurement
Includes/excludes the measurement that
causes IRQ (having difference > ∆am to
reference) in auto-averaging.
2
am_aew1
0
00: 4
01: 8
10: 16
11: 32
Weight of last measurement result for
auto-averaging.
1
am_aew2
0
0
am_ae
0
0: Use Amplitude measurement
reference register
Selects reference value for amplitude
measurement Wake-up mode.
Table 106. Amplitude measurement reference register
Bit
Name
Default
Function
Comments
7
am_ref7
0
-
-
6
am_ref6
0
-
-
5
am_ref5
0
-
-
4
am_ref4
0
-
-
3
am_ref3
0
-
-
2
am_ref2
0
-
-
1
am_ref1
0
-
-
0
am_ref0
0
-
-



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