AWR2243: How to control AWR2243 by SPI?

Hi,  we use TM4C1294NCPDT control AWR2243 by SPI interface. AWR2243 is set to Functional Mode(SOP0:1, SOP1:0, SOP2:0).

We executed the following operations:

1) Reset AWR2243;

2) Got the interrupt from AWR2243 (interrupt signal from HIGH to LOW);

3) Write CNYS + Dummy to AWR2243 by SPI interface, the SPI timing is met the requirment of AWR2243 (mmWave-Radar-Interface-Control.pdf 3.2.4), and the data(0x5678,0x8765,0xffff,0xffff,0xffff, 0xffff,0xffff,0xffff) is right.

After step 3), we didn't get the interrupt change(from LOW to HIGH), How to debug this issue?