Found some small errors in the datasheet. Is this a good place to submit?
Table 5, First row should read:
1,2,13 to 15, 68 to 72, 75 to 81, 87, 88 | D17,D16,D7 to D5, D31 to D27, D26 to D20, D19, D18
// n.b. the order of the sets is reversed wrt pin # vs. mnemonic #
Description is wrong, should read:
Amplitude Scale Factor | This 12-bit word controls the DDS *frequency*. Note that the OSK enable bit (0x00) must be set to logic high to make amplitude adjustments.
Phase offset word | This 16-bit word controls the DDS *phase*.
// confusing if three different words all set frequency :-)