AS3911 datasheet(123/159 Pages) AMSCO

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[v2-11] 2016-Jun-13

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AS3911 − Application Information

Capacitance Measurement Configuration Register

Figure 113:

Capacitance Measurement Configuration Register

Note(s):

1. Default setting is set at power-up and after Set Default command.

Address 3Ah: Capacitance Measurement Configuration

Type: RW

Bit

Name

Default

Function

Comments

7cm_d3

Definition of

Δcm (difference to

reference which triggers

interrupt)

6cm_d2

5cm_d1

4cm_d0

3cm_aam

0: Exclude the IRQ measurement

1: Include the IRQ measurement

Include/exclude the

measurement which causes

IRQ (having difference >

Δcm

to reference) in

auto-averaging

2cm_aew1

00: 4

01: 8

10: 16

11: 32

Define weight of last

measurement result for

auto-averaging

1cm_aew0

0cm_ae

1: Use capacitance

measurement auto-averaging as

reference

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