Automotive CXPI responder interface IC with built-in hardware logic

Toshiba Electronics Europe GmbH will begin sampling the TB9033FTG, a CXPI responder interface IC with built-in hardware logic. The hardware logic can control the data communication using the CXPI protocol and GPIO, eradicating the necessity for dedicated software development and thereby shortening development times.

The new product allows multiplexing of automotive communications and reduces the number of wire harnesses used in body control system applications, contributing to vehicle weight reduction. Compared to the LIN protocol, the high-speed response of the CXPI responder interface device makes it suited for applications including steering wheel switches, meter cluster switches, light switches, and door locks and mirrors.

The device has 16 GPIO pins – six can be switched to one circuit of 10bit AD converter input, and four pins can be switched to four circuits of 8bit PWM output. The device is also equipped with an input monitoring function during sleep mode, a switch matrix (maximum 4x4) input function, and an output function in the event of communication disruption.

This device's standby current consumption is only 10µA, indicating that it draws minimal power while in sleep mode. Low EMI and high EMS mean less noise is generated, which eases system design. Also, the device's high ESD characteristic makes it highly resistant to static electricity.

The TB9033FTG includes fault detection circuits for overtemperature, overvoltage, and low voltage. In addition, the device can predict fault conditions and automatically alert the commander node, contributing to improved fault detection performance. The device's operating temperature range is from -40C to 125C, and it will conform to the AEC-Q100 standard.

The company is also developing an automotive CXPI communication driver receiver IC that can be switched between the commander and responder node via an external pin.