AS3689 datasheet(40/72 Pages) AMSOSRAM

40 / 72 page

AS3689

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (mlg, ptr)

Revision 1.0.2 / 20070115

38 - 70

Addr: 18h

Pattern control

This register controls the RGB pattern

Bit

Bit Name

Default

Access

Description

pattern_color

R/W

Defines the pattern type for the RGBx current sinks

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

1b = RGB pattern with each 10 bits (set all rgbx_mode = 11)

2:1

pattern_delay

R/W

Delay between pattern

00b = 0 sec

01b = 1 sec (8 sec if pattern_slow=1)

10b = 2 sec (16 sec if pattern_slow=1)

11b = 3 sec (24 sec if pattern_slow=1)

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_slow

R/W

Pattern timing control

0b = normal mode

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

factor of eight)

7.4.6 External Overtemp comparator

If the LED temperature for CURR3x flash led is monitored with an external temperature sensor, the current sink

CURR3x can be automatically switched from strobe to preview current levels, if the external temperature sensor’s

voltage drops below VOVtemp. to avoid overheating of the flash LED.

The overtemperature comparator is multiplexed to GPIO and is switched on automatically, if Bit

curr3x_ext_ovtemp is set.

Table 16 – Overtemp comparator Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Note

VOVtemp

Comparator switch level

1.22

1.25

1.28

AS3689 Datasheet(PDF) 40 Page - ams-OSRAM AG

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