How to initialize the Digital(MEMS) Microphone configuration

Hi, Venkat,

The TLV320AIC3262 Application Reference Guide explains how to configure the registers to accept the digital microphone function. I suggest to take a look at section 2.4.3.5.2 Digital Microphone Function.

I hope this helps you. Please let me know if you have more questions or comments.

Best regards,
Luis Fernando Rodríguez S.

Hi Luis,

please explain clearly, I tried the below code snippet but its not working

I referred this  link   2.4.3.5.2 Digital Microphone Function, please give me the snippet code or configurations for digital mic

/software reset/
appI2CWrite2(0x00,0xFF,0x00);
appI2CWrite2(0x7F,0xFF,0x00);
appI2CWrite2(0x01,0xFF,0x01);

//# Configure Power Supplies
appI2CWrite2(0x00,0xFF,0x01);
appI2CWrite2(0x01,0xFF,0x00);
appI2CWrite2(0x7A,0xFF,0x01);//
appI2CWrite2(0x79,0xFF,0x33);
appI2CWrite2(0x21,0xFF,0x28);
appI2CWrite2(0x22,0xFF,0x3e);
appI2CWrite2(0x23,0xFF,0x10);
appI2CWrite2(0x08,0xFF,0x00);//Set the input common mode to 0.9V

//# Clock configuration
appI2CWrite2(0x00,0xFF,0x00);
appI2CWrite2(0x04,0xFF,0x00);//Set DAC_CLKIN as MCLK1
appI2CWrite2(0x0b,0xFF,0x83);//NDAC =1,power up
appI2CWrite2(0x0c,0xFF,0x84);//MDAC =2,power up
appI2CWrite2(0x0D,0xFF,0x00);//DOSR MSB=0
appI2CWrite2(0x0E,0xFF,0x80);//DOSR LSB=128
appI2CWrite2(0x12,0xFF,0x83);//NADC =1,power up
appI2CWrite2(0x13,0xFF,0x84);//MADC =2,power up
appI2CWrite2(0x14,0xFF,0x80);//AOSR =128


//Signal Processing Settings
appI2CWrite2(0x00,0xFF,0x00);
appI2CWrite2(0x3C,0xFF,0x01);
appI2CWrite2(0x3d,0xFF,0x01);

//analog power up sequences
appI2CWrite2(0x00,0xFF,0x01);//page 1
appI2CWrite2(0x3b,0xFF,0x3c);//left mic pga//0x0c
appI2CWrite2(0x3c,0xFF,0x3c);//RIGHT MIC PGA set//0x0c
appI2CWrite2(0x3d,0xFF,0x00);//ADC Analog programmed for PTM_R4
appI2CWrite2(0x00,0xFF,0x00);//Select Page 0
appI2CWrite2(0x51,0xFF,0xC0);//Power-up ADC Channel
appI2CWrite2(0x52,0xFF,0x00);//Unmute ADC channel and Fine Gain = 0dB*/

/adc power sequences*/
appI2CWrite2(0x51,0xFF,0xD6);//enable left & right adc channels to digital mic
/*digital mic setting */
AIC3262_change_page(4);
appI2CWrite2(0x65,0xFF,0x05);//Left Channel on GPIO2 Rising Clock Edge, Right Channel on GPIO2 Falling Clock Edge
appI2CWrite2(0x5C,0xFF,0x10);//GPI2 is enbled for Digital mic input
appI2CWrite2(0x57,0xFF,0x28);//GPIO2 is ADC_MOD_CLK


//Output Channel Configuration--headset configurations
appI2CWrite2(0x00,0xFF,0x00);//Select Page 0
appI2CWrite2(0x3F,0xFF,0xC0);//Power up the Left and Right DAC Channels
appI2CWrite2(0x40,0xFF,0x00);//Unmute the DAC digital volume control
appI2CWrite2(0x00,0xFF,0x01);//Select Page 1
//Set DAC PTM mode to PTM_P3
appI2CWrite2(0x03, 0xFF,0x00);
appI2CWrite2(0x04, 0xFF,0x00);
//appI2CWrite2(0x0B, 0xFF,0x25);
appI2CWrite2(0x1F,0xFF,0x87);//Headphone in Ground-centered Mode, HPL Gain=0dB
appI2CWrite2(0x20,0xFF,0x87);//HPR To have same gain as HPL, set to 0dB
appI2CWrite2(0x09,0xFF,0x00);//HP Sizing = 100%
appI2CWrite2(0x1b,0xFF,0x33);//Enable DAC to HPL/R and power-up HPL/R

/bypass adc data to dac
appI2CWrite2(0x00,0xFF,0x04);
appI2CWrite2(0x76,0xFF,0x30);