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AS3668

Data Sheet - Detailed Description

Table 30. Audio Control Register

0x42 Audio Control Register

Bit

Bit Name

Default

Access

Bit Description

audio_input_pin

R/W

This bit enables pin GPIO/AUDIO_IN or CURR4 pin to be configured as

audio input pin for audio playback synchronization of the current sources.

0: GPIO/AUDIO_IN selected for audio synchronization

1: CURR4 pin selected for audio synchronization

pld_off

R/W

This bit defines if the internal pull down resistor of GPIO/AUDIO_IN pin is

enabled or disabled. If the audio mode is enabled the internal pull down is

automatically disabled

0: Pull down resistor enabled if register aud_buf_on is set to ‘0’

1: Pull down resistor disabled

adc_characteristic

R/W

Defines the ADC characteristic of the ADC for general purpose ADC

measurements depending on the selected ADC characteristics in register

adc_mode.

00: x*250mV (adc_mode = 0)

01: x*50mV (adc_mode = 0)

00: 75mV*2

x(adc_mode = 0 or adc_mode = 1)

4:3

audio_decay

R/W

Defines the audio decay time.

00: 10ms

01: 20ms

10: 40ms

11: 80ms

2:0

audiosync_mode

R/W

In this register it is possible to select between different audio synchronization

modes of the current sources in order to create different lighting effects.

000: 4 LED bar code

001: 4 LED bar code with dimming

010: Running LED bar code

011: Running LED bar code with dimming

100: RGB (CURR1, CURR2, CURR3; CURR4 not used)

101: RGB with dimming (CURR1, CURR2, CURR3; CURR4 not used)

110: 4 LED parallel with dimming

111: Do not use

Table 31. Audio Output Register

0x43 Audio Output Register

Bit

Bit Name

Default

Access

Bit Description

curr4_aud_en

R/W

This register allows the user to select between normal control (e.g. PWM

pattern control) and audio synchronization mode of current source CURR4 .

0: CURR4 normal function

1: CURR4 audio synchronization mode

curr3_aud_en

R/W

This register allows the user to select between normal control (e.g. PWM

pattern control) and audio synchronization mode of current source CURR3 .

0: CURR3 normal function

1: CURR3 audio synchronization mode

curr2_aud_en

R/W

This register allows the user to select between normal control (e.g. PWM

pattern control) and audio synchronization mode of current source CURR2 .

0: CURR2 normal function

1: CURR2 audio synchronization mode

curr1_aud_en

R/W

This register allows the user to select between normal control (e.g. PWM

pattern control) and audio synchronization mode of current source CURR1 .

0: CURR1 normal function

1: CURR1 audio synchronization mode

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