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320f28335 I/O口电平问题

目前客户要求选用tja1050作为can收发器,但是这个收发器是5V供电的,实测can输入输出电平4.1V。28335技术参数上标明I/O端口最高耐压4.6V,推荐电压3.465V,不知我用这个收发器直接与can输入输出口连接会不会影响DSP的寿命(通讯过程高电平4.1V),目前通讯正常,就是担心时间久了有问题,望大神解答。