The FPD-Link III Receiver recovers 32-bits of Sensor status from the attached DS90UB935-Q1 serializer. Interrupts may be generated based on changes in the Sensor Status values received from the forward channel. The Sensor Status consists of 4 bytes of data, which may be read from the SENSOR_STS_x registers for each Receive port. Interrupts may be generated based on a change in any of the bits in the first byte (SENSOR_STS_0). Each bit can be individually masked for Rising and/or Falling interrupts.

Two registers control the interrupt masks for the SENSOR_STS bits: SEN_INT_RISE_CTL and SEN_INT_FALL_CTL.

Two registers provide interrupt status: SEN_INT_RISE_STS, SEN_INT_FALL_STS.

If a mask bit is set, a change in the associated SENSOR_STS_0 bit will be detected and latched in the SEN_INT_RISE_STS or SEN_INT_FALL_STS registers. If the mask bit is not set, the associated interrupt status bit will always be 0. If any of the SEN_INT_RISE_STS or SEN_INT_FALL_STS bits is set, the IS_FC_SEN_STS bit will be set in the PORT_ISR_HI register.