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AS3665
Datasheet, Confidential - D e t a i l e d D e s c r i p t i o n A u d i o I n p u t
Table 43. ADC_MSB_Result Register (Continued)
Addr: 0Ah
ADC_MSB_Result Register
Bit
Bit Name
Default Access
Description
Indicates end of ADC conversion cycle
7
result_not_ready
NA
R
0
Result is ready
Table 44. ADC_LSB_Result Register
Addr: 0Bh
1
Conversion is running
ADC_LSB_Result Register
Bit
Bit Name
Default Access
Description
2:0
adc<2:0>
NA
R
ADC Result bits 2:0 (LSBs)
Audio Input
Figure 20. Audio Input internal Circuit
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input signal on pad INT/AUDIO_IN .
AS3665
The audio input can be used to connect an analog audio signal to the AS3665 and do lighting effects dependent on this
8
The audio processing path is shown in Figure 20 : The audio signal is amplified by the input amplifier with an adjustable
gain setting to allow different audio input levels. With the ADC the signal is converted into a digital 10 bits signal. After
the AGC, the data is filtered and then can be used with the sequencer command Get ADC (see page 67) . The
sequencers can then run different filter and processing algorithms to obtain the lighting effects.
Table 45. Audio_Control Register
Addr: 1Ch
Audio_Control Register
Bit
Bit Name
Default Access
Description
Enable AGC and Peak Detect for audio processing
0
audio_on
0b
R/W
0
Get ADC gets ADC value directly
1
Get ADC uses AGC and audio filter -recommended
setting if a audio signal is connected to the AS3665
8. Set int_mode =01 (analog input for ball INT/AUDIO_IN) and set adc_select =0 (to select audio buffer)
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