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I2C也可总线取电!
2022-07-25 09:24:00 【悟渔】
真是一个意外的发现,以前只听说过单总线有向总线上取电的方式.现在才发现,原来24CXX也可以向总线取电.
这个发现是在一次I2C总线拷贝机设计中发现的.本来设计了一个电源控制,调试中发现断开电源仍然可以正常读写.后来干脆只使用三个引脚:GND、SCL、SDA。即只接地线、时钟线和数据线,居然存取完全正常!
我想,是不是厂家在新的设计中采取了总线取电方式造成的。期待有专业人士给个专业的解释。
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