TJA1021T/10/C,112

The TJA1021T/10/C,112 is a physical layer transceiver module with a high-speed serial data communication interface developed by the NXP semi-conductor company. This transceiver module is specifically designed for automotive applications and is used in both automotive diagnostic data-bus and in-vehicle network applications. The TJA1021T/10/C,112 is intended to be used in combination with a suitable micro-controller to form a complete communication interface suitable for various automotive diagnostic applications.

Application Field

The TJA1021T/10/C,112 transceiver module offers a reliable and robust physical layer interface for automotive diagnostics. As a highly integrated component, the TJA1021T/10/C,112 combines several control and diagnostic functions, such as a low power idle mode, fail-safe functions, wake up detection and automatic bit-rate detection. The module also has an embedded ASIC that combines high-speed Manchester encoding and decoding, as well as amplitude modulation. The TJA1021T/10/C,112 transceiver module is capable of operating successfully at transmission rates of up to 12Mb/s.

The TJA1021T/10/C,112 is suitable for use in a wide variety of applications such as vehicle diagnosis, engine control, powertrain systems and body controller systems. The module also complies with ISO 13400, the automotive diagnostics standard, and is suitable for use with both SAE J1850 (VPW) and ISO 15765 (CAN) busses. Furthermore, the module features an error detection and correction function for data transmission.

Working Principle

The TJA1021T/10/C,112 transceiver module is based on the Universal Serial Bus (USB) technology, which provides a cost effective data communication solution. The module provides electrical and mechanical interfaces that allows communication between the host controller and the vehicle data-bus.

The module operates in the following manner. After being powered up, the module waits for a wake up pattern to be received from the data-bus. When the wake up pattern is detected, the module switches to the normal mode. This mode is used for receiving and transmitting data packets on the data-bus. The module then receives and transmits the data packets according to the protocol used by the data-bus.

The module then begins to perform error detection and correction on the received data packets. In the event of an error, the module will attempt to correct the data using error correction algorithms. If the data cannot be corrected, the module will discard the data and stop transmitting. This ensures the integrity of the data on the data-bus.

The module also utilizes a low power idle mode to reduce power consumption when the data-bus is idle. In this idle mode, the module consumes very little power, thus drastically reducing power requirements in automotive applications. This is crucial as automotive systems are often powered by limited sources such as a battery.

Conclusion

The TJA1021T/10/C,112 is a specialized transceiver module designed by NXP semiconductor specifically for automotive applications. The module provides a reliable and robust physical layer interface to the vehicle data-bus and is capable of operating at transmission rates of up to 12Mb/s. The module also complies with the ISO13400 automotive diagnostics standard and is suitable for use with both SAE J1850 (VPW) and ISO 15765 (CAN) protocols. Additionally, the module features an error detection and correction function for data transmission, as well as a low power idle mode.