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我司选用tms320f28034,在常温下,该芯片工作正常.但-30℃以后,CAN 通信异常,通信不了.反复排查问题,发现是mcu有问题.
比如,把MCU的CAN 通信两个引脚,通过导线连到低温箱外面,通信还是异常.
然后再MCU上门放置了一个加热电阻,这是通信就正常.
想问一下,这个芯片的CAN,能不能在低温环境下工作,比如-30到-40度.还有,我司是不是采购到了次品?
