标题：can模块
简介
控制局域网CAN (controller area network)是国际上应用最广泛的现场总线之一.它作汽车环境中的微控制讯,  can模块在车载各电子控制装置ECU之间交换信息，形成汽车电子控制网络，CAN几乎成了汽车设计领域一种必须采用的技术手段。
CAN模块是一款对整车各电子控制装置之间实现通讯数据转发的智能电控设备，从而使整车实现车载电控装置区域性网络控制系统。采用了功能强大的带有两路CAN控制器的16位微控制器。支持CAN2.0A和CAN2.0B协议。按"SAE J1939"标准协议开发．支持K线诊断功能。可同时适用于高速和低速CAN总线网络。具有很好的密封性，可使用于各种恶劣环境。
功能概述
当车载各电子控制装置在不具有CAN功能（如果是不具有CAN通讯能力的电控装置，使得其与其它电控装置相互之间不能进行数据通讯，这样造成各电控装置的电控能力差，功能单一，可扩展性差），不能直接进行通讯的情况下，采用“CAN模块”产品就可以实现具有CAN功能的车载电控网络系统，各电控装置相互之间可以相互传递所需的电控信号，使得整车的电控系统作用更加强大。
端口资源配置
◆ 2路5V电压输出，可提供100毫安电流；
◆ 2路数字转模拟信号输出，12位转换精度；
◆ 4路开关量输出；
◆ 1路转速信号输入（磁电信号）；
◆ 8路模拟信号输入，12位转换精度；
◆ 3路开关量输入检测，可实现对有源和无源传感器的信号捕捉；
◆ 接口信息：1个RS232接口，2个K线接口，2个CAN总线接口；
功能特点
◆ 可以通过CAN总线网络方便地实现整车中各节点的数据信息的接收和发送；
◆ 可以实时采集发动机各传感器信息，及时了解发动机的运行状态；
◆ 可以对系统进行诊断；
◆ 具有多样的输入和输出接口，可灵活地实现信号功能的转换； 
运用情况
此产品其主要功能是发动ECU通过CAN模块连接到CAN总线，实现与TCU、HCU、IC等模块的数据转输及数据转换控制ECU．CAN模块连接上水温、油机压力、转速等传感器，将传感器数据与ECU控制时的数据发送给TCU、HCU、IC，且又把TCU、HCU的控制功能信息通过CAN模块传递给ECU。
CAN Module Device
Brief introduction：Control Local area network (Controller area network) is the one of the widest application for the total line in the world. As the mini-controller communication of the automotive environment, it can change the information between the ECUs installed on the vehicles, and become to the automotive electronic control network. CAN is almost the obligatory technology method adopted in automotive design field.
CAN module device is an intelligent electronic control device which can achieve communication data transferred among each electronic control device installed in the automobile, thereby, it can make the automobile become a network control system of on-vehicle electronic control device area. Adopt powerful 16-bit micro-controllers with two way, Support protocols of CAN 2.0 A and CAN 2.0B and Developed by the standard protocol SAEJ1939, K-line diagnosis function is available. Meantime, fit for high-speed CAN bus line network as well as low-speed. Good sealing property can used in all kinds of bad conditions.
Function introduction：When electronic control device on-vehicle without CAN function (It can not transfer data communication with other devices If these electronic control device without CAN communication function. The function of device will be reduced, singleness and hard to expand), and can’t communicate directly. CAN module device can make the on-vehicle electronic control network system have CAN function. It can transmit all the needed signal among each device and make the electronic control system more powerful.
Port Resource Allocation：◆ Two channels of 5V output voltage, can supply 100 ma current. 
◆ Two channels of Digital-to-Analog Converter Output,12-bit conversion accuracy.
◆ Four channels of on-off output.
◆ One channel of RPM signal input (magnetic electricity signal).
◆ Eight channels of analog signal input, 12-bit conversion accuracy.
◆ Three channels of on-off input test, to achieve the capture of signals from active and passive sensors.
◆ Port information: one RS232 port, two K-line ports, two CAN bus port.
Function characteristic：◆ Achieve the receiving and sending of data information from all nodes on vehicle through the CAN bus line network.
◆ Collect information of each sensor in real time, keep abreast of the running situation from the engine.
◆ System diagnostic. 
◆ Various input and output interface, can achieve signal function transferring neatly.
Application condition：
This product has good application in the gas-electric hybrid bus project which developed together with the research institute of The First Automobile factory of China. The main function is to make ECU connect with the CAN bus line via the CAN module. It controls ECU through the data transfer and conversion with TCU, HCU, IC module, etc. CAN module is connected to the water temperature sensor, oil pressure sensor , speed sensors and send the data of sensors and data under the controlling of ECU to TCU,HCU,IC , meanwhile it sends the control function information of TCU and HCU to ECU via CAN module.