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ST25R3911B bảng dữ liệu(PDF) 93 Page - STMicroelectronics

tên linh kiện ST25R3911B
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ST25R3911B bảng dữ liệu(HTML) 93 Page - STMicroelectronics

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1.3.58
Capacitance measurement configuration register
Address: 3Ah
Type: RW
Table 89. Capacitance measurement configuration register
Bit
Name
Default
Function
Comments(1)
7
cm_d3
0
Definition of Δcm (difference to reference that triggers
interrupt)
-
6
cm_d2
0
5
cm_d1
0
4
cm_d0
0
3
cm_aam
0
0: Exclude the IRQ measurement
1: Include the IRQ measurement
Include/exclude the measurement that
causes IRQ (having difference > Δcm to
reference) in auto-averaging
2
cm_aew1
0
00: 4
01: 8
10: 16
11: 32
Define weight of last measurement
result for auto-averaging
1
cm_aew0
0
0
cm_ae
0
0: Use Capacitance measurement reference register
1: Use capacitance measurement auto-averaging as
reference
Select reference value for capacitance
measurement Wake-Up mode
1. Default setting takes place at power-up and after set default command.
1.3.59
Capacitance measurement reference register
Address: 3Bh
Type: RW
Table 90. Capacitance measurement reference register
Bit
Name
Default
Function
Comments(1)
7
cm_ref7
0
-
-
6
cm_ref6
0
-
-
5
cm_ref5
0
-
-
4
cm_ref4
0
-
-
3
cm_ref3
0
-
-
2
cm_ref2
0
-
-
1
cm_ref1
0
-
-
0
cm_ref0
0
-
-
1. Default setting takes place at power-up and after set default command
ST25R3911B
Registers
DS11793 - Rev 6
page 93/116



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