AS3668 datasheet(41/60 Pages) AMSCO

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AS3668

Data Sheet - D e t a i l e d D e s c r i p t i o n

dim_curr1

A register read of this register reflects the status of current source CURR1. If

the register returns 0, the current source is switched off. If the register

returns 1, the current source is switch on with the current defined in register

curr1_current.

0: Current Source CURR1 is switched off

1: Current Source CURR1 is switched on

A write to this register defines the target value for CURR1. If 0 is written to

this register CURR1 is switched off or dimmed down depending on register

start_dim. If 1 is written to this register CURR1 is switched on or dimmed up

depending on register start_dim. Mind that this setting is only effective if

CURR1 is configured to PWM mode in register curr1_mode.

0: Target value of CURR1 for dimming down or direct control

1: Target value of CURR1 for dimming up or direct control

Table 38. Pattern Timing Register

0x18 Pattern Timing Register

Bit

Bit Name

Default

Access

Bit Description

5:3

pattern_toff

0x03

R/W

These bits define the value of the parameter toff_CURR. It defines the off

time of CURR1, CURR2, CURR3 and CURR4 in pattern generation mode.

The same value is used for all four current sources in parallel.

000: 0.08s

001: 0.15s

010: 0.28s

011: 0.54s

100: 1.1s

101: 2.1s

110: 4.2s

111: 8.4s

2:0

pattern_ton

R/W

These bits define the value of the parameter ton_CURR. It defines the on

time of CURR1, CURR2, CURR3 and CURR4 in pattern generation mode.

The same value is used for all four current sources in parallel.

000: 0.04s

001: 0.07s

010: 0.14s

011: 0.27s

100: 0.53s

101: 1.1s

110: 2.1s

111: 4.2s

Table 37. PWM Trigger Register

0x17 PWM Trigger Register

Bit

Bit Name

Default

Access

Bit Description

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