AS3911 datasheet(108/149 Pages) AMSCO

108 / 149 page

AS3911 – 108

ams Datasheet, Confidential: 2013-Oct [2-03]

A p pl i c at io n I n f o r m at i o n

Wake-up Timer Control Register

Figure 100:

Wake-up Timer Control Register

Note:

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

Figure 101:

Typical Wake-up Time

Address 31h: Wake-up Timer Control Register

Type: RW

Bit

Name

Default

Function

Comments

7wur

0: 100 ms

1: 10 ms

Wake-up timer range

6wut2

Refer to Typical Wake-up Time

Wake-up timer timeout value

5wut1

4wut0

3wto

1: IRQ at every timeout

2wam

1: At timeout perform

Amplitude measurement

IRQ if difference larger than

Δam

1wph

1: At timeout perform Phase

measurement

IRQ if difference larger than

Δpm

0wcap

1: At timeout perform

Capacitance measurement

IRQ if difference larger than

Δcm

Typical Wake-up Time

wut2

wut1

wut0

100 ms Range

(wur=0)

10 ms Range

(wur=1)

100 ms

10 ms

200 ms

20 ms

300 ms

30 ms

400 ms

40 ms

500 ms

50 ms

600 ms

60 ms

700 ms

70 ms

800 ms

80 ms

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