AS3675 datasheet(39/81 Pages) AMSCO

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AS3675

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

Figure 20. Soft dimming example Waveform for CURR30-32

LED Pattern Registers

Table 51. Pattern data0...Pattern data3

Registers

Addr: 19h,1Ah,1Bh,1Ch

Pattern data0, Pattern data1, Pattern data2, Pattern data3

This registers contains the pattern data for the current sinks.

Bit

Bit Name

Default Access

Description

7:0

pattern_data[7:0]

1. 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

R/W

Pattern data0

7:0

pattern_data[15:8]1111

R/W

Pattern data1

7:0

pattern_data[23:16]1111

R/W

Pattern data2

7:0

pattern_data[31:24]1111

R/W

Pattern data3

Table 52. Pattern control

Addr: 18h

Pattern control

This register controls the LED pattern

Bit

Bit Name

Default Access

Description

pattern_color

0R/W

Defines the pattern type for the current sinks

single 32 bit pattern (also set currX_mode = 11)

RGB pattern with each 10 bits (set all

currX_mode = 11)

2:1

pattern_delay

00b

R/W

Delay between pattern, details (see Table 55); together with

pattern_delay2 sets the delay time between patterns

softdim_pattern

1. If softdim_pattern=1, don’t set curr30_mode, curr31_mode, curr32_mode or curr33_mode to 11b.

R/W

Enable the ‘soft’ dimming feature for the pattern generator

Pattern generator directly control current

sources

‘Soft Dimming’ is performed (see page 37)

Table 53. gpio current

Addr: 2Ch

gpio current

Bit

Bit Name

Default Access

Description

pattern_delay2

0R/W

Delay between pattern (see Table 55 on page 39); together

with pattern_delay sets the delay time between patterns

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