13.5.1.2 Transfer Size
Descriptor[17:16] contains the transfer size bits as follows:
- 11 = Reserved
- 10 = One 32-bit word is transferred at a time
- 01 = One 16-bit word is transferred at a time
- 00 = One byte is transferred at a time
Note that SIZEn[1:0] overrules DMAxCH.SIZE[1:0] when its descriptor table is enabled.