The spec clearly indicates that cancelling SEQ during HRESP is legal but seems a bit ambiguous about cancelling NONSEQ during HRESP. If NONSEQ can be cancelled, is there any rule that NONSEQ targeting a different peripheral (not the one giving HRESP) cannot be cancelled? Or can any NONSEQ be cancelled by the manager when the manager gets an HRESP (regardless of which peripheral provided it)?