1.General descriptionThe UJA1076A core System Basis Chip (SBC) replaces the basic discrete componentscommonly found in Electronic Control Units (ECU) with a high-speed Controller AreaNetwork (CAN).The UJA1076A supports the networking applications used to control power and sensorperipherals by using a high-speed CAN as the main network interface.The core SBC contains the following integrated devices:• High-speed CAN transceiver, inter-operable and downward compatible with CANtransceiver TJA1042, and compatible with the ISO 11898-2 and ISO 11898-5standards• Advanced independent watchdog (UJA1076A/xx/WD versions)• 250 mA voltage regulator for supplying a microcontroller; extendable with externalPNP transistor for increased current capability and dissipation distribution• Separate voltage regulator for supplying the on-board CAN transceiver• Serial Peripheral Interface (SPI) (full duplex)• 2 local wake-up input ports• Limp-home output portIn addition to the advantages gained from integrating these common ECU functions in asingle package, the core SBC offers an intelligent combination of system-specificfunctions such as:• Advanced low-power concept• Safe and controlled system start-up behavior• Detailed status reporting on system and sub-system levelsThe UJA1076A is designed to be used in combination with a microcontroller thatincorporates a CAN controller. The SBC ensures that the microcontroller always starts upin a controlled manner.UJA1076AHigh-speed CAN core system basis chipRev. 2 — 31 January 2011Product data sheet
