TDC7201: Tdc7201 can't receive the start signal

I tried to control tdc7201 using Stm32. When I write START_MENS bits, I can receive a trigger signal. There is a 28k PWM output on the start pin. However, the Tdcx_int_status register has been reading back values that are 0x00. I also tried to wait for the trigger signal before sending the pulse, and the result was the same.May I ask what the problem is?Configure register values as follows：{0x22, 0x40, 0x07, 0x07, 0xFF, 0xFF, 0xFF, 0xFF, 0x0, 0x0 }。