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AWR2243: no SPI_HOST_INT Low level detected at TDA3X side

hugo
Intellectual 350 points
Part Number: AWR2243

Hi ,TI experts, 

            We are debugging communication process on our  custom RADAR board using the AWR2243 with TDA3X SOC ,we are trying to  get  AWR2243  to communicate with TDA3X,

our SOP setting : SOP mode 4 (SOP0 =1, SOP1 = 0, SOP2 =0)  Functional SPI mode as described in SWRS223A(AWR2243 spec) . 

we tested SPI loopback mode at TDA3X side ( shorted MOSI and SOMI of AWR2243 ) , SPI works well.

software environment : PROCESSOR_SDK_RADAR_03_08_00_00

test project is vps_test_monitor_radar with hardware adaption changes.

The bahavior that we found , after releasing  AWR2243's NRST, got  SPI_HOST_INT rising edge interrupt .  We subsequently send a series of sync sequences to AWR2243, but we never found SPI_HOST_INT to go low 

 Is there anything we missed that leading to wrong  behavior as we found? 

 FYI I attached our captured waveform of  oscilloscope the behavior of the SPI_HOST_INT, SPI_CS SPI_CLK,SPI_MOSI.

Thanks.