AS3668_07 datasheet(44/59 Pages) AMSCO

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Revision 1.13

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AS3668 2V0

Data Sheet - Register Map

9 Register Map

Table 44. I2C Register Overview

Addr

Name

Chip ID

3Eh

CHIP ID1

chip_id1<7:0>

Constant value ‘b10100101’

3Fh

CHIP ID2

chip_id2<7:4>

revision<3:0>

LED Control

01h

CurrX control

curr4_mode<7:6>

0: current source 4 off; 1:current source 4 on;

2: current source 4 PWM; 3: Current source 4 Patt.

curr3_mode<5:4>

0: current source 3 off; 1:current source 3 on;

2: current source 3 PWM; 3: Current source 3 Patt.

curr2_mode<3:2>

0: current source 2 off; 1:current source 2 on;

2: current source 2 PWM; 3: Current source 2 Patt.

curr1_mode<1:0>

0: current source 1 off; 1:current source 1 on;

2: current source 1 PWM; 3: Current source 1 Patt.

02h

CURR1 current curr1_current<7:0>

Output current for current source CURR1 = 0mA ... 25.5mA; 256 steps of 0.1mA.

03h

CURR2 current curr2_current<7:0>

Output current for current source CURR2 = 0mA ... 25.5mA; 256 steps of 0.1mA.

04h

CURR3 current curr3_current<7:0>

Output current for current source CURR3 = 0mA ... 25.5mA; 256 steps of 0.1mA.

05h

CURR4 current curr4_current<7:0>

Output current for current source CURR4 = 0mA ... 25.5mA; 256 steps of 0.1mA.

2Bh

CurrX low

voltage status

curr4_low_v

0: CURR4 voltage ok

1: CURR4 low voltage

curr3_low_v

0: CURR3 voltage ok

1: CURR3 low voltage

curr2_low_v

0: CURR2 voltage ok

1: CURR2 low voltage

curr1_low_v

0: CURR1 voltage ok

1: CURR1 low voltage

GPIO Control

06h

GPIO Control

gpio_in_invert

0: non-inverted dig. input

1: inverted digital input

gpio_in_en

0: analog input

1: digital input

gpio_mode

0: Input only

1: Output (open drain)

07h

GPIO Output

gpio_out

0: GPIO pin low

1: GPIO pin high

08h

GPIO Signal

gpio_in

0: GPIO pin low

1: GPIO pin high

PWM control

15h

PWM Control

pwm_dim_shape

0: logarithmic ramp

1: linear ramp

pwm_src

0: internal PWM

1: external PWM

16h

PWM Timing

pwm_dim_speed_up<7:4>

0: immediate 1: 0.12s 2: 0.25s 3: 0.38s 4: 0.51s 5: 0.77s 6: 1.0s 7: 1.6s 8: 2.1s

9: 2.6s 10: 3.1s 11: 4.2s 12: 5.2s 13: 6.2s 14: 7.3s 15: 8.3s

pwm_dim_speed_down

0: immediate 1: 0.12s 2: 0.25s 3: 0.38s 4: 0.51s 5: 0.77s 6: 1.0s 7: 1.6s 8: 2.1s

9: 2.6s 10: 3.1s 11: 4.2s 12: 5.2s 13: 6.2s 14: 7.3s 15: 8.3s

AS3668 Datasheet(PDF) 44 Page - ams AG

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