AS3636 datasheet(31/42 Pages) AMSCO

31 / 42 page

www.austriamicrosystems.com

Revision 0.7

31 - 42

with additional features

with photosensor

AS3636

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

Table 20. LED Current Register

Addr: 10h

LED Current Register

AF LED and indicator LED current and PWM settings

Bit

Bit Name

Default Access

Description

2:0

AF_LED_current

000b

R/W

AF LED Current settings

000

10mA

001

15mA

010

20mA

011

28mA

100

37mA

101

50mA

110

65mA

111

80mA

5:3

AF_LED_PWM

000b

R/W

AF LED PWM setting

000

1/32

001

2/32

010

3/32

011

5/32

100

8/32

101

12/32

110

20/32

111

32/32

7:6

IND_LED_current

00b

R/W

Indicator LED current setting

2mA

4mA

8mA

16mA

1. AF_LED_current setting is automatically limited to Max_LED_current (see page 32)

2. The internal PWM generator output frequency is 31.25kHz (to avoid audible noise)

Table 21. LED Control Register

Addr: 11h

LED Control Register

Control AF LED and indicator LED operating mode

Bit

Bit Name

Default Access

Description

IND

0R/W

Indicator LED on/off

0off

if ILP=0: use VLED output with AF_LED_current and

AF_LED_PWM duty cycle

if ILP=1: use IND output with IND_LED_current

AS3636 Datasheet(PDF) 31 Page - ams AG

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