TAS5766MDCAEVM: How to configure TAS5766MDCAEVM to do SNR test ?

Actually, TAS5766M is able to do playback after power-on if a 4-wire I2S is provided. Hence, it is not necessary to initialize TAS5766M.

If you use an Audio Precision audio analyzer to do the SNR measurement, I would suggest you feed the I2S signals via J4 on the PurePath Console Mother Board.

Run the following script in PPC3 I2C Master to enable external I2S inputs before you perform SNR measurement.

# Change to GPIO mode
i gpio
# Set bank 0
w 99 04 01
# Clear bits (command 01) with mask 20 - clears P1.5 of Bank 0
w 99 01 20

# Go back to I2C mode
i i2cfast
# Set pins 21-24 as outputs
w 44 0E 0F
# Set pin 23 high (MCLK-MUX = PSIA)
w 44 06 7F

Andy