AS3689 datasheet(39/72 Pages) AMSOSRAM

39 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

37 - 70

Figure 20 – Softdimming example Waveform for RGB1, RGB2 and RGB3

However using the identical dimming waveform for two channels is possible as shown in the following figure:

Figure 21 – Softdimming example Waveform for RGB1, RGB2 and RGB3

7.4.5.2 LED Pattern Registers

Addr: 19h,1Ah,1Bh,1Ch Pattern data0, Pattern data1, Pattern data2, Pattern data3

This registers contains the pattern data for the RGB current sinks.

Bit

Bit Name

Default

Access

Description

7:0

pattern_data0[7:0]

R/W

Pattern data0

7:0

pattern_data1[15:8]

R/W

Pattern data1

7:0

pattern_data2[23:16]

R/W

Pattern data2

7:0

pattern_data3[31:24]

R/W

Pattern data3

Note:

Update any of the pattern register only if none of the current sources is connected to the pattern

generator (‘xxxx’_mode must not be 11b). The pattern generator is automatically started at the

same time when any of the current sources is connected to the pattern generator

RGB1

RGB2

RGB3

not possible

A new dimming up (RGB2) can be

started after the dimming

down (RGB1) is finished

A new dimming up (RGB3) cannot be

started after or while one channel (RGB1)

is dimming up

RGB1

RGB2

RGB3

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