UJA1069

UJA1069 LIN fail-safe system basis chip Rev. 04 — 28 October 2009 Product data sheet 1. General description The UJA1069 fail-safe System Basis Chip (SBC) replaces basic discrete components which are common in every Electronic Control Unit (ECU) with a Local Interconnect Network (LIN) interface. The fail-safe SBC supports all networking applications which control various power and sensor peripherals by using LIN as a local sub-bus. The fail-safe SBC contains the following integrated devices: LIN transceiver compliant with LIN 2.0 and SAE J2602, and compatible with LIN 1.3 Advanced independent watchdog Dedicated voltage regulator for microcontroller 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 fail-safe 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 UJA1069 is designed to be used in combination with a microcontroller and a LIN controller. The fail-safe SBC ensures that the microcontroller is always started up in a defined manner. In failure situations the fail-safe SBC will maintain the microcontroller function for as long as possible, to provide full monitoring and software driv...