3690
правок
(Новая страница: «R1 and R2 inputs also work as discrete inputs.») |
(Новая страница: «While the internal current source is activated (as by default) the input is pulled high to the internal 3.3V power rail. If the input is left floating, the corres…») |
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While the internal current source is activated (as by default) the input is pulled high to the internal 3.3V power rail. | |||
If the input is left floating, the corresponding discrete input state is a logic high. | |||
If the input is connected to the signal ground the input state is a logic zero. | |||
Therefore, external buttons, sensors, etc. should be connected between the Rx and GND terminals. | |||