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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

Table 37. PWM Trigger Register

0x17 PWM Trigger Register

Bit

Bit Name

Default

Access

Bit Description

start_dim

R/W

This bit defines in PWM mode of the current sources if the outputs are

switched on/off directly or dimmed up/down using the timing of register

pwm_dim_speed_up.

0: direct on/off of current sources

1: logarithmic/linear - up/down dimming of current sources

dim_curr4

A register read of this register reflects the status of current source CURR4. 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

curr4_current.

0: Current Source CURR4 is switched off

1: Current Source CURR4 is switched on

A write to this register defines the target value for CURR4. If 0 is written to

this register CURR4 is switched off or dimmed down depending on register

start_dim. If 1 is written to this register CURR4 is switched on or dimmed up

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

CURR4 is configured to PWM mode in register curr4_mode.

0: Target value of CURR4 for dimming down or direct control

1: Target value of CURR4 for dimming up or direct control

dim_curr3

A register read of this register reflects the status of current source CURR3. 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

curr3_current.

0: Current Source CURR3 is switched off

1: Current Source CURR3 is switched on

A write to this register defines the target value for CURR3. If 0 is written to

this register CURR3 is switched off or dimmed down depending on register

start_dim. If 1 is written to this register CURR3 is switched on or dimmed up

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

CURR3 is configured to PWM mode in register curr3_mode.

0: Target value of CURR3 for dimming down or direct control

1: Target value of CURR3 for dimming up or direct control

dim_curr2

A register read of this register reflects the status of current source CURR2. 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

curr2_current.

0: Current Source CURR2 is switched off

1: Current Source CURR2 is switched on

A write to this register defines the target value for CURR2. If 0 is written to

this register CURR2 is switched off or dimmed down depending on register

start_dim. If 1 is written to this register CURR2 is switched on or dimmed up

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

CURR2 is configured to PWM mode in register curr2_mode.

0: Target value of CURR2 for dimming down or direct control

1: Target value of CURR2 for dimming up or direct control

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