1. wakeup0~wakeup3, RTC external wakeup input, RTC外部唤醒输入,字面理解哈,我是否可以悬空?
2.RTC 里面的ON_OFF管脚,POWER ENABLE OUTPUT PIN, 我如果不需要检测这个信号,是悬空还是上拉下拉?
3.有没有文档,对整个芯片的管脚,假如不用的话,是上拉下来还是悬空,做个说明的?
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
1. wakeup0~wakeup3, RTC external wakeup input, RTC外部唤醒输入,字面理解哈,我是否可以悬空?
2.RTC 里面的ON_OFF管脚,POWER ENABLE OUTPUT PIN, 我如果不需要检测这个信号,是悬空还是上拉下拉?
3.有没有文档,对整个芯片的管脚,假如不用的话,是上拉下来还是悬空,做个说明的?
有文档可以参考,请看下面的schematic checklist。
Table 2. Proper RTC Connections
https://www.ti.com/lit/an/sprack7b/sprack7b.pdf