General description

The UJA1061 fail-safe System Basis Chip (SBC) replaces basic discrete components that are common in every Electronic Control Unit (ECU) with a Controller Area Network (CAN) and a Local Interconnect Network (LIN) interface. The fail-safe SBC supports all networking applications that control various power and sensor peripherals by using fault-tolerant CAN as the main network interface and LIN as a local sub-bus.

Features and benefits

General

■ Contains a full set of CAN and LIN ECU functions:

? CAN transceiver and LIN transceiver

? Voltage regulator for the microcontroller (3.3 V or 5.0 V)

? Separate voltage regulator for the CAN transceiver (5 V)

? Enhanced window watchdog with on-chip oscillator

? Serial Peripheral Interface (SPI) for the microcontroller

? ECU power management system

? Fully integrated autonomous fail-safe system

■ Designed for automotive applications:

? Supports 14 V, 24 V and 42 V architectures

? Excellent ElectroMagnetic Compatibility (EMC) performance

? ±8 kV ElectroStatic Discharge (ESD) protection Human Body Model (HBM) for off-board pins

? ±6 kV ElectroStatic Discharge (ESD) protection IEC 61000-4-2 for off-board pins

? ±60 V short-circuit proof CAN/LIN-bus pins

? Battery and CAN/LIN-bus pins are protected against transients in accordance with ISO 7637

? Very low sleep current

■ Supports remote flash programming via the CAN-bus

■ Small 6.1 mm × 11 mm HTSSOP32 package with low thermal resistance

CAN transceiver

■ ISO 11898-3 compliant fault-tolerant CAN transceiver

■ Enhanced error signalling and reporting

■ Dedicated low dropout voltage regulator for the CAN-bus:

? Independent from microcontroller supply

? Guarded by CAN-bus failure management

? Significantly improves EMC performance

■ Partial networking option with global wake-up feature, allows selective CAN-bus communication without waking up sleeping nodes

■ Bus connections are truly floating when power is off

■ Ground shift detection

LIN transceiver

■ LIN 2.0 compliant LIN transceiver

■ Enhanced error signalling and reporting

■ Downward compatible with LIN 1.3 and the TJA1020

Power management

■ Smart operating modes and power management modes

■ Cyclic wake-up capability in Standby and Sleep modes

■ Local wake-up input with cyclic supply feature

■ Remote wake-up capability via the CAN-bus and LIN-bus

■ External voltage regulators can easily be incorporated in the power supply system (flexible and fail-safe)

■ 42 V battery-related high-side switch for driving external loads such as relays and wake-up switches

■ Intelligent maskable interrupt output

Fail-safe features

■ Safe and predictable behavior under all conditions

■ Programmable fail-safe coded window and time-out watchdog with on-chip oscillator, guaranteeing autonomous fail-safe system supervision

■ Fail-safe coded 16-bit SPI interface for the microcontroller

■ Global enable pin for the control of safety-critical hardware

■ Detection and detailed reporting of failures:

? On-chip oscillator failure and watchdog alerts

? Voltage regulator undervoltages

? CAN and LIN-bus failures (short-circuits and open-circuit bus wires)

? TXD and RXD clamping situations and short-circuits

? Clamped or open reset line

? SPI message errors

? Overtemperature warning

? ECU ground shift (two selectable thresholds)

■ Rigorous error handling based on diagnostics

■ 23 bits of access-protected RAM is available e.g. for logging of cyclic problems

■ Reporting in a single SPI message; no assembly of multiple SPI frames needed

■ limp-home output signal for activating application hardware in case system enters Fail-safe mode (e.g. for switching on warning lights)

■ Fail-safe coded activation of Software development mode and Flash mode

■ Unique SPI readable device type identification

■ Software-initiated system reset

UJA1061屬于集成電路（IC） > 專用。恩智浦半導(dǎo)體公司制造生產(chǎn)的UJA1061專用該系列產(chǎn)品可提供所需的功能，用以將信息源/信宿連到各種復(fù)雜或范圍狹窄應(yīng)用中的傳感器、變送器、致動(dòng)器、傳輸介質(zhì)或其他此類端點(diǎn)。例如，汽車安全氣囊驅(qū)動(dòng)器、車身控制和信息娛樂總線、自適應(yīng)電纜均衡器、智能卡等等。