Hi,
Regarding “I need to use ASRC's with TDM interfaces on a 21489, but the flexibility of the ASRC ports for TDM appears very limited. As a start, can someone please elaborate on the required BCK polarity for the ASRC in TDM mode?”
>>I would suggest you to kindly refer to the page 659/1304 of the ADSP-214xx Hardware Reference Manual in order to understand how ASRC is used in TDM mode. The link for the manual is given below:
http://www.analog.com/static/imported-files/processor_manuals/ADSP-214xx_hwr_rev1.1.pdf
Please let me know if there is any further queries.
Thanks,
Harshit