Hi Du lg ,
楼主你好!
你这个冒烟的问题,尤其是工作一段时间冒烟,一般情况下,还是和你的硬件有关,我甚至很大程度上怀疑你的焊接,助焊剂,我不知道你是否是手工焊,焊接之后是否用洗板水好好洗洗。因为8脚VDDA, 9脚VREFL, 10脚VSS, 也就是电源和地是紧挨着的两个脚,我们国内很多的助焊剂,锡油质量不是很好,如果不洗板, 刚上电没有问题,但是工作一段时间,那个板上残留的锡油自己会导电,有时候将VDDA和GND短路,冒烟,你这个问题,我之前自己开发的板子没有洗板也遇到过,后来我洗了板子就没有问题了,你可以试试你冒烟的板子,把芯片吹掉,好好用洗板水(酒精)洗下MCU的封装,洗干净再焊一颗新的,然后再好好洗下,再上电试试,另外,你供电我建议你用外部的限流的可调电源,这样做个500mA的限流,然后再长时间测试试试,因为就算遇到问题,也不会因为短接过流烧你的芯片。
希望能帮到你。
Wish it helps you!
Have a great day,
Kerry
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Hi Du lg ,
楼主你好!
你这个冒烟的问题,尤其是工作一段时间冒烟,一般情况下,还是和你的硬件有关,我甚至很大程度上怀疑你的焊接,助焊剂,我不知道你是否是手工焊,焊接之后是否用洗板水好好洗洗。因为8脚VDDA, 9脚VREFL, 10脚VSS, 也就是电源和地是紧挨着的两个脚,我们国内很多的助焊剂,锡油质量不是很好,如果不洗板, 刚上电没有问题,但是工作一段时间,那个板上残留的锡油自己会导电,有时候将VDDA和GND短路,冒烟,你这个问题,我之前自己开发的板子没有洗板也遇到过,后来我洗了板子就没有问题了,你可以试试你冒烟的板子,把芯片吹掉,好好用洗板水(酒精)洗下MCU的封装,洗干净再焊一颗新的,然后再好好洗下,再上电试试,另外,你供电我建议你用外部的限流的可调电源,这样做个500mA的限流,然后再长时间测试试试,因为就算遇到问题,也不会因为短接过流烧你的芯片。
希望能帮到你。
Wish it helps you!
Have a great day,
Kerry
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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另外,PTB4, pin 19是NMI引脚,建议你最好加个上拉,而且保证上电的时候,NMI引脚是高电平,否则你后面可能会出现启动的问题。
RST上拉10K, 对地0.1uf
SWD_DIO上拉10K。
Wish it helps you!
Have a great day,
Kerry
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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