Hello.
I have TLV320AIC3204EVM-K. I am connect externally:
MCLK = 24.576MHz
BCLK = 512KHz
WCLK = 8KHz
Audio Interface = I2S
Data Word length = 32 bits
Digital Loopback mode.
J1= sine wave 3KHz /150mV RMS.
Clock/Interface setting the next:
On J6 I have the next signal:
I have approximately 12 samples for period.
Fs = 3KHz * 12= 36KHz
I don't understand why I have only 36KHz sampling rate after interpolation dac.
As far as I understand Fs must be the next:
6.144MHz / 32bits = 192KHz.
Script file is attached.
# High Performance Stereo Recording ############################################### # Software Reset ############################################### # # Select Page 0 w 30 00 00 # # Initialize the device through software reset w 30 01 01 # ############################################### ############################################### # Clock Settings # --------------------------------------------- # The codec receives: MCLK = 24.576 MHz, # BLCK = 512 KHz, WCLK = 8 kHz ############################################### # # Select Page 0 w 30 00 00 # # NADC = 2, MADC = 12 w 30 12 82 8C # ############################################### # Audio Interface Setting 32bits w 30 1B 30 ############################################### # Signal Processing Settings ############################################### # # Select Page 0 w 30 00 00 # # Set the ADC Mode to PRB_P1 w 30 3d 01 # ############################################### ############################################### # Initialize Codec ############################################### # # Select Page 1 w 30 00 01 # # Disable weak AVDD in presence of external # AVDD supply w 30 01 08 # # Enable Master Analog Power Control w 30 02 00 # # Select ADC PTM_R4 w 30 3d 00 # # Set the input powerup time to 3.1ms (for ADC) w 30 47 32 # # Set the REF charging time to 40ms w 30 7b 01 # ############################################### ############################################### # Recording Setup ############################################### # # Select Page 1 w 30 00 01 # # Route IN1L to LEFT_P with 20K input impedance w 30 34 80 # # Route Common Mode to LEFT_M with impedance of 20K w 30 36 80 # # Route IN1R to RIGHT_P with input impedance of 20K w 30 37 80 # # Route Common Mode to RIGHT_M with impedance of 20K w 30 39 80 # # Unmute Left MICPGA, Gain selection of 6dB to make channel gain 0dB # Register of 6dB with input impedance of 20K => Channel Gain of 0dB w 30 3b 0c # # Unmute Right MICPGA, Gain selection of 6dB to make channel gain 0dB # Register of 6dB with input impedance of 20K => Channel Gain of 0dB w 30 3c 0c # # Select Page 0 w 30 00 00 # # Power up LADC/RADC w 30 51 c0 # # Unmute LADC/RADC w 30 52 00 # ############################################### ############################################### # High Performance Stereo Playback # --------------------------------------------- # PowerTune mode PTM_P3 is used for high # performance 16-bit audio. For PTM_P4, # an external audio interface that provides # 20-bit audio is required. # # For normal USB Audio, no hardware change # is required. # # If using an external interface, SW2.4 and # SW2.5 of the USB-ModEVM must be set to # HI and clocks can be connected to J14 of # the USB-ModEVM. # # Audio is routed to both headphone and # line outputs. ############################################### # Clock Settings # --------------------------------------------- # The codec receives: MCLK = 24.576 MHz, # BLCK = 512 KHz, WCLK = 8 kHz ############################################### # # Select Page 0 w 30 00 00 # # NDAC = 2, MDAC = 2, DOSR = 768 w 30 0b 82 w 30 0c 82 w 30 0d 03 w 30 0e 00 # ############################################### ############################################### # Signal Processing Settings ############################################### # # Select Page 0 w 30 00 00 # # Set the DAC Mode to PRB_P8 w 30 3c 08 # ############################################### ############################################### # Initialize Codec ############################################### # # Select Page 1 w 30 00 01 # # Disable weak AVDD in presence of external # AVDD supply w 30 01 08 # # Enable Master Analog Power Control w 30 02 00 # # Set the input powerup time to 3.1ms (for ADC) # w 30 47 32 # # Set the REF charging time to 40ms w 30 7b 01 # ############################################### ############################################### # Playback Setup ############################################### # # Select Page 1 w 30 00 01 # # De-pop w 30 14 25 # # Route LDAC/RDAC to HPL/HPR w 30 0c 08 08 # # Route LDAC/RDAC to LOL/LOR w 30 0e 08 08 # # Power up HPL/HPR and LOL/LOR drivers w 30 09 3C # # Unmute HPL/HPR driver, 0dB Gain w 30 10 00 00 # # Unmute LOL/LOR driver, 0dB Gain w 30 12 00 00 # # Select Page 0 w 30 00 00 # # DAC => 0dB w 30 41 00 00 # # Power up LDAC/RDAC w 30 3f d6 # # Unmute LDAC/RDAC w 30 40 00 # ###############################################
I am hope for your help.
Thanks.
