uja1066 NXP Semiconductors, uja1066 Datasheet - Page 7

• Manufacturer Part Number: uja1066
• Description: High-speed Can Fail-safe System Basis Chip
• Manufacturer: NXP Semiconductors

NXP Semiconductors
6. Functional description
UJA1066_2
Product data sheet
6.1 Introduction
6.2 Fail-safe system controller
The UJA1066 combines all the peripheral functions found around a microcontroller in a
typical automotive networking application in a single, dedicated chip. These functions are:
The fail-safe system controller is at the core of the UJA1066 and is supervised by a
watchdog timer that is clocked directly by the dedicated on-chip oscillator. The system
controller manages the register configuration and controls the internal functions of the
SBC. Detailed device status information is collected and presented to the microcontroller.
The system controller also provides the reset and interrupt signals.
The fail-safe system controller is a state machine. The SBC operating modes, and how
transitions between modes are triggered, are illustrated in
discussed in more detail in the following sections.
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Power supply for the microcontroller
Power supply for the CAN transceiver
Switched BAT42 output
System reset
Watchdog with Window and Time-out modes
On-chip oscillator
High-speed CAN transceiver for serial communication; suitable for 14 V and 42 V
applications
SPI control interface
Local wake-up input
Inhibit or limp-home output
System inhibit output port
Compatible with 42 V power supply systems
Fail-safe behavior
Rev. 02 — 5 May 2009
High-speed CAN fail-safe system basis chip
Figure
3. These modes are
UJA1066
© NXP B.V. 2009. All rights reserved.
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