General description
The UJA1065 System Basis Chip (SBC) replaces basic discrete components which are common in every Electronic Control Unit (ECU) with a Controller Area Network (CAN) and a Local Interconnect Network (LIN) interface. The SBC supports all networking applications which control various power and sensor peripherals by using high-speed CAN as the main network interface and LIN as a local sub-bus. The SBC contains the following integrated devices:

• High-speed CAN transceiver, inter-operable and downwards compatible with CAN transceiver TJA1041 and TJA1041A, and compatible with the ISO11898-2 standard and the ISO11898-5 standard (in preparation)
• LIN transceiver compliant with LIN 2.0 and SAE J2602, and compatible with LIN 1.3
• Advanced independant watchdog
• Dedicated voltage regulators for microcontroller and CAN transceiver
• Serial peripheral interface (full duplex)
• Local wake-up input port
• Inhibit / limp home output port

In addition to the advantages of integrating these common ECU functions in a single package, the SBC offers an intelligent combination of system-specific functions such as:

• Advanced low power concept
• Safe and controlled system start-up behavior
• Advanced fail-safe system behavior that prevents any conceivable deadlock
• Detailed status reporting on system and sub-system levels

The UJA1065 is designed to be used in combination with a microcontroller with a CAN controller. The SBC ensures that the microcontroller is always started up in a defined manner. In failure situations the SBC will maintain the microcontroller function for as long as possible, to provide full monitoring and software driven fall-back operation.

The UJA1065 is designed for 14 V single power supply architectures and for 14 V and 42 V dual power supply architectures.