NXP TJA1080A FlexRay 解决方案

       NXP 公司的TJA1080A 是FlexRay收发器，主要用于1Mbps 到10Mbps的通信系统， 能在FlexRay网络的物理总线和协议控制器间提供先进的接口，可以配置成有源星形收发器或节点收发器。

       TJA1080支持模式控制，如TJA1054和TJA1041 CAN收发器中的应用。TJA1080广泛用在汽车电子的高速控制，车内通信架构中的骨干，驱动器辅助系统以及和安权相关的应用。本文介绍了TJA1080的主要性能和优点，方框图以及典型的有源星形网络配置和节点配置。

       The TJA1080 is a FlexRay transceiver, which is in line with the FlexRay electrical physical layer specification V2.1 Rev. A。It is primarily intended for communication systems from 1 Mbit/s to 10 Mbit/s, and provides an advanced interface between the protocol controller and the physical bus in a FlexRay network.

       The TJA1080 can be configured to be used as an active star transceiver or as a node
transceiver. The TJA1080 provides differential transmit capability to the network and differential receive capability to the FlexRay controller. It offers excellent EMC performance as well as high ESD protection.

       The TJA1080 actively monitors the system performance using dedicated error and status information (readable by any microcontroller), as well as internal voltage and temperature monitoring.

       The TJA1080 supports the mode control as used in NXP Semiconductors TJA1054
and TJA1041 CAN transceivers.

As the world’s fi rst silicon solution for the FlexRay electrical physical layer, the high-speed communication system transceiver TJA1080 highlights FlexRay’s power and versatility. This key device is helping drive new advanced communications system into today’s and tomorrow’s cars by offering an extensive feature set, excellent EMC performance and the unique possibility to create active star couplers.

       主要特性：

Data transfer from 1 Mbit/s up to 10 Mbits/s
Excellent EMC performance
- Very low ElectroMagnetic Emission to support unshielded cable
- Differential receiver with high common-mode range for excellent ElectroMagnetic Immunity
Can be used for linear passive bus topologies as well as active star topologies
Low power management including two inhibit switches enabling power consumption optimized ECU design
Very low current in Sleep and Standby mode
Autonomous power modes when used in active stars
Local wake-up input as well as remote wake-up capability via the FlexRay bus
Wake-up source recognition
Extensive diagnosis (over temperature and under voltage detection, wake-up source indication, error indication)
Detection and fail-safe mode in case of an under voltage on pins VBAT, VCC or VIO
± 8 kV ESD protection (HBM)
Protected against transients in automotive environment (ISO 7637 class C compliant)
Protected against short-circuit on bus lines
Passive behavior of bus lines in the event that transceiver is not powered
Supports 2.5, 3.0, 3.3 and 5 V microcontrollers and automatically adapts to interface levels
Can be used in 14 V and 42 V systems
Interface to optional Bus Guardian for bus access supervision
Automotive product qualifi cation in accordance with AEC-Q100

       主要优点：
Allows full and simplified early development of complete FlexRay networks
- configurable as a node or as a star transceiver
Supports wide range of microcontrollers (including the SJA25xx), maximizing flexibility and lowering cost of nodes
In star configuration, fault containment by isolating parts of the network leads to more reliable networks
Delivers robust communications due to extensive error diagnosis and protection mechanisms

       主要应用：
Advanced high-speed control applications
- power train, suspension, steering, braking, etc.
Backbone of a complete in-car communications architecture
Driver assistance systems
Safety relevant applications (e.g. brake-by-wire, steer-by-wire, etc.)

图1。TJA1080A方框图

本文来源：NXP公司     作者：

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