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TMS320F28377D: Fast Serial Interface : some clarifications /questions

Part Number: TMS320F28377D

Hi Everybody , 

please some questions about FSI interface :

- payload lenght  is  max 16 words for frame  , in case of  Register Defined Data Lenght   ? 

- considering a daisy-chain connection  (cf. pag. 13 “multi-axys system options”), the task to send  a frame RX/TX inside swicth is  SW managed or can the HW handle it itself ? 

-in multidrop connection  , nodes addressing and bus arbitration  must be handle by SW ? 

thank you very much 

regards

Carlo