moving from dm6467-594 to dm6467-729

DM647-594 and DM6467-729 are same except the upscaled frenency. They are 100% pin-compatible and all voltage rails are same. Look at the Frequency tables in datasheet (http://www.ti.com/lit/gpn/tms320dm6467). Look at Table 7-2 (DM6467 Clock Domains) and Table Tables 7-8/7-9/7-10 in Section 7-5. That's all the difference between them.

Regards, Srirami.