Hi TI sir,
We met problem with ADMP421 and TLV320DAC3203. No any audio data checked by oscilloscope.
MICBIAS is provided by AVDD 1.8V and configure REG 0x33 with HEX 0x50 -- means MICBIAS is 1.7V. The other DAC3203 configuration follows user guide. But we can't get any audio data from MIC.
Please give us some advice.
DAC CONFIG:
#----------- Initialize to page 0
w 30 00 00
#----------- Initialize the device through software reset
w 30 01 01
#----------- Set PLL_CLKIN as MCLK and CODEC_CLKIN as PLL_CLK,
w 30 04 03
#----------- Power up pll, set pll divider P=1 and pll divider R=1,
w 30 05 91
#----------- Set pll divider J=8
w 30 06 08
#----------- Set pll divider D=0000
w 30 07 00
w 30 08 00
#----------- Power up and set NADC divider = 2,
w 30 12 82
#----------- Power up and set MDAC divider = 16
w 30 13 90
#----------- Set AOSR = 64
w 30 14 40
#----------- Select page 1
w 30 00 01
#----------- Disable internal crude AVdd in presence of external AVdd supply
#----------- or before powering up internal AVdd LDO
w 30 01 08
#----------- Enable master analog power control
w 30 02 00
#----------- Set the REF charging time to 40ms
w 30 7b 01
#----------- Select page 0
w 30 00 00
#----------- Select PRB_R2
w 30 3d 02
#----------- Configure MISO as clock output for digital microphone
w 30 37 0e
#----------- Power up left ADC and right ADC. Enable digital microphone mode for left ADC
#----------- and right ADC. Treat data on SCLK as digital microphone data
w 30 51 dc
#----------- Unmute left ADC and right ADC
w 30 52 00
