CC2745R10-Q1: CC2745--SPI Setup and hold time

Hello TI team:

    We used CC2745R10,the SPI was configured via software for a 1 Mbps clock rate, while measured timing results showed setup time of 560 ns. If the setup time should theoretically be half the clock period, but measured results show 560 ns while the datasheet specifies no explicit value tSU,CI, what potential issues could arise and what improvement measures are recommended?