LIN fail-safe system basis chip
Description
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 driven fall-back operation.
The UJA1069 is designed for 14 V single power supply architectures and for 14 V and 42 V dual power supply architectures.
NXP Semiconductors
UJA1069
LIN fail-safe system basis chip
2.
Features
2.
1 General
I Contains a full set of LIN ECU functions: N LIN transceiver N Voltage regulator for the microcontroller (5.
0 V) N Enhanced window watchdog with on-chip oscillator N Serial Peripheral Interface (SPI) for the microcontroller N ECU power management system N Fully integ...
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