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基于TJA1054设计的汽车CAN收发技术

发布时间:2020-06-30 19:44:40 阅读: 来源:齿轮泵厂家

本文引用地址:是控制器局部网(CAN)中的协议控制器和物理总线间的接口器件,提供差分接收和发送功能,波特速率高达125kBd,可连接高达32个节点,支持未屏蔽的总线连接,有非常低的电磁辐射(EME)和非常高的电磁干扰(EMI)免疫力,并集成了接收滤波器。TJA1054主要特性和优势:Optimized for in-car low-speed communicationBaud rate up to 125 kBdUp to 32 nodes can be connectedSupports unshielded bus wiresVery low ElectroMagnetic Emission (EME) due to built-in slope control function and avery good matching of the CANL and CANH bus outputsVery high ElectroMagnetic Immunity (EMI) in normal and low power operating modesFully integrated receiver filtersTransmit Data (TxD) dominant time-out functionBus failure managementSupports single-wire transmission modes with ground offset voltages up to 1.5 VAutomatic switching to single-wire mode in the event of bus failures, even when the CANH bus wire is short-circuited to VCCAutomatic reset to differential mode if bus failure is removedFull wake-up capability during failure modesProtectionsBus pins short-circuit safe to battery and to groundThermally protectedBus lines protected against transients in an automotive environmentAn unpowered node does not disturb the bus linesSupport for low power modesLow current sleep mode and standby mode with wake-up via the bus linesPower-on reset flag on the output图1。TJA1054方框图图2。TJA1054动态特性测试电路图

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