ST25R3911B datasheet(89/116 Pages) STMICROELECTRONICS

89 / 116 page

1.3.50

Amplitude measurement configuration register

Address: 32h

Type: RW

Table 81. Amplitude measurement configuration register

Bit

Name

Default

Function

Comments(1)

am_d3

Definition of Δam (difference to reference that triggers

interrupt)

am_d2

am_d1

am_d0

am_aam

0: Exclude the IRQ measurement

1: Include the IRQ measurement

Include/exclude the measurement that

causes IRQ (having difference > Δam to

reference) in auto-averaging

am_aew1 0

00: 4

01: 8

10: 16

11: 32

Define weight of last measurement

result for auto-averaging

am_aew2 0

am_ae

0: Use Amplitude Measurement Reference register

1: Use amplitude measurement auto-averaging as

reference

Select reference value for amplitude

measurement Wake-Up mode

1. Default setting takes place at power-up and after Set Default command

1.3.51

Amplitude measurement reference register

Address: 33h

Type: RW

Table 82. Amplitude measurement reference register

Bit

Name

Default

Function

Comments(1)

am_ref7

am_ref6

am_ref5

am_ref4

am_ref3

am_ref2

am_ref1

am_ref0

1. Default setting takes place at power-up and after Set Default command.

ST25R3911B

Registers

DS11793 - Rev 6

page 89/116

ST25R3911B Datasheet(PDF) 89 Page - STMicroelectronics

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