TAS5825M: Programming

Part Number: TAS5825M

The following is a partial I2S data dump of programming the 2.1 model of the Eval board 
w 98 03 0f   // reset   dsp 1 
w 30 00 00  
w 30 7f 00  
w 30 01 01  
w 30 04 33 
w 30 05 00 91 08 
w 30 0d 00 
w 30 0e 80 
w 30 12 02 
w 30 13 88 80 
w 30 0b 02 
w 30 08 00 
w 30 09 00 
w 30 0c 88 
w 30 7f 78 

What is the purpose of w 30 ? I can find anything about it in the docs.