没有用到的端口怎样处理才省电

2019-07-25 16:14发布

430的MCU 没有用到的端口怎样处理才省电啦。设置成什么状态才省电啦?
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19条回答
dengdc
2019-07-26 12:17
Unused I/O pins should be configured as I/O function, output direction, and left unconnected on the PC
board, to prevent a floating input and reduce power consumption. The value of the PxOUT bit is irrelevant,
since the pin is unconnected. Alternatively, the integrated pullup/pulldown resistor can be enabled by
setting the PxREN bit of the unused pin to prevent the floating input. See the System Resets, Interrupts,
and Operating Modes chapter for termination of unused pins.

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