[AK4753]
OPERATION OVERVIEW
■ Overview of AK4753
The AK4753 is an audio CODEC with integrated digital signal processors.
It is easy to use since the two inputs 8-bit SAR ADC and EEP-ROM I/F are integrated.
The SAR ADC has 2-channel input selector and the AD conversion is executed sequentially.
The SAIN1 value is used to control the internal DATT. The SAIN2 value is used to control the gain of the EQ. When
the analog input of the SAIN1/2 changes, the register value of the DATT/EQ is changed automatically.
This external EEP-ROM is used to store the coefficient values for the DSP blocks, and the setting data. When the
AK4753 is powered up, it reads the data in EEP-ROM at first, and maps these values into the internal registers.
The following contents are stored in EEP-ROM.
a. Fundamental function
-Output Configuration Setting (Stereo mode, 2.1-channel mode or 4-channel mode)
-PLL mode setting: master or slave, PLL Reference Clock, Sampling Frequency
-Audio Interface Format
-DATT
-Post-Gain and Pre-Gain setting for DSP1/2
-Limiter setting for DSP1/2
b. Coefficient data for DSP1/2
-Coefficient data of LPF/HPF
-Coefficient data of Five Biquads
MS1311-E-00
2011/07
- 18 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
