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AM4377: HS version questions

Part Number: AM4377

Hello TI world.

I need to implement secure boot feature to a product which currently uses a  non-HS version of AM4377. It is stated in the datasheet that secure boot is supported only by HS version of the chip, but I cannot see any other information about that version of the chip. Is this a different part number. How do I order the HS version? Is is hardware-compatible with non-HS - can I simply replace it in an existing design?