[FAQ] TLV320AIC3254: TLV320AIC32xx Family Beep Generator Configuration

The Beep Generator configuration is described in this application report: http://www.ti.com/lit/an/slaa446/slaa446.pdf

Below is an example script for configuring the TLV320AIC3254EVM-K for beep generation. Note that the configuration for other EVMs will be different, but the beep generator section would be the same. The important detail is that PRB_P25 is selected and the MDAC*DOSR value is proper (refer to the resource class (RC) in the device datasheet and application reference guide).

BEEP.txt

For the devices described above, whenever the Beep command is issued (Page 0 / Register 71, D7 = '1'), NDAC needs to be off to prevent audio glitches. The following script provides an example of doing this on-the-fly without audible clicks or pops: 

w 30 00 00              # Page 0
w 30 40 0C              # Mute DACs
f 30 26 xxx1xxx1        # Wait for mute flag
w 30 0B 02              # Turn off NDAC
w 30 47 8C              # Beep!, -6dB Gain
w 30 0B 82              # Turn on NDAC
w 30 40 00              # Un-mute DACs
f 30 47 0xxxxxxx        # Wait for beep to finish

The command 'f' polls registers until a bit is set '1' or cleared '0'. The 'x' is don't care.

Applies to:

TLV320AIC3204, TLV320AIC3206, TLV320AIC3253, TLV320AIC3254, TLV320AIC3256, TLV320DAC3203, TLV320AIC3100, TLV320AIC3110, TLV320AIC3111, TLV320AIC3120, TLV320AIC3136