AS3677 datasheet(36/68 Pages) AMSCO

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AS3677

Datasheet - D e ta i l e d D e s c r i p t i o n

2:1

amb_gain

0R/W

Control Ambient Light Sensor preprocessing gain

gain = 1/4

gain = 1/2

gain = 1

gain = 2

amb_keep

0R/W

Enable S/H of group tables output - see Figure 24 on

page 34

Group output is enabled (S/H = sampling)

Groups outputs on hold (S/H = hold)

Table 46. ALS filter Register

Addr: 91h

ALS filter

control for ambient light sensor filtering

Bit

Bit Name

Default Access

Description

2:0

amb_filter_up

000

R/W

Controls the filter cut off (-3dB) frequency (increasing)

000

0.25Hz

001

0.5Hz

010

1Hz

011

2Hz

100

4Hz

101

8Hz

110

16Hz

111

32Hz

6:4

amb_filter_down

000

R/W

Controls the filter cut off (-3dB) frequency (decreasing)

000

0.25Hz

001

0.5Hz

010

1Hz

011

2Hz

100

4Hz

101

8Hz

110

16Hz

111

32Hz

Table 47. ALS offset Register

Addr: 92h

ALS offset

Bit

Bit Name

Default Access

Description

7:0

amb_offset

00h

R/W

Controls the offset of the ambient light sensor

Table 45. ALS control Register (Continued)

Addr: 90h

ALS control

control ambient light sensing

Bit

Bit Name

Default Access

Description

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