A radar data processing system is disclosed. The system includes a microcontroller and a data receiver-transmitter integrated circuit coupled to the microcontroller. The data receiver-transmitter integrated circuit includes a sensor and a dedicated error indicator pin. The data receiver-transmitter integrated circuit includes an inner safety monitor and the microcontroller includes an outer safety monitor. The inner safety monitor configured to receive and collate sensor data from the plurality of sensors and send, through the dedicated error indicator pin, a function warning signal to the outer safety monitor when the sensor data from the sensor is indicative of a functional irregularity.