AS3687 datasheet(28/55 Pages) AMSCO

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AS3687/87XM

Datasheet

www.austriamicrosystems.com/AS3687

1v3-4

27 - 54

Addr: 18h

Pattern control

This register controls the LED pattern

Bit

Bit Name

Default

Access

Description

pattern_color

R/W

Defines the pattern type for the current sinks

0b = single 32 bit pattern (also set currX_mode = 11)

1b = RGB pattern with each 10 bits (set all currX_mode =

11)

2:1

pattern_delay

00b

R/W

Delay between pattern, details see table LED Pattern timing;

together with pattern_delay2 sets the delay time between

patterns

softdim_pattern

R/W

Enable the ‘soft’ dimming feature for the pattern generator

0 = Pattern generator directly control current sources

1 = ‘Soft Dimming’ is performed – see section ’Soft Dimming

for pattern’

curr30_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR30 controlled according curr30_mode register

1b = CURR30 controlled by LED pattern generator

curr31_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR31 controlled according curr31_mode register

1b = CURR31 controlled by LED pattern generator

curr32_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR32 controlled according curr32_mode register

1b = CURR32 controlled by LED pattern generator

curr33_pattern

R/W

Additional CURR33 LED pattern control bit

0b = CURR33 controlled according curr33_mode register

1b = CURR33 controlled by LED pattern generator

Addr: 2Ch

gpio_current

Bit

Bit Name

Default

Access

Description

pattern_delay2

R/W

Delay between pattern see table LED Pattern timing;

together with pattern_delay sets the delay time between

patterns

pattern_slow

R/W

Pattern timing control

0b = normal mode

1b = slow mode (all pattern times are increased by a

factor of eight)

Figure

20 –LED Pattern timing

pattern_slow pattern_delay2 pattern_delay[1..0]

bit duration [ms]

delay [s]

pattern duration [s]

delay between patterns

pattern_color=0 pattern_color=1

between

patterns

(total cycle time:

pattern + delay)

100

250

800

1 Even by setting 000 for pattern delay, there is a small delay before the new patterns starts.

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