B.4.2 Digital I/O
B.4.2.1 Digital Inputs
The Prototyping Board has four digital inputs, IN0–IN3, each of which is protected over a
range of –36 V to +36 V. The inputs are pulled up to +3.3 V as shown in Figure B-5.
JP6
+3.3 V
27 k W
?
22 k W
GND
Figure B-5. Prototyping Board Digital Inputs
The actual switching threshold is between 0.9 V and 2.3 V. Anything below this value is a
logic 0, and anything above is a logic 1 .
The digital inputs are each fully protected over a range of -36 V to +36 V, and can handle
short spikes of ±40 V.
84
RabbitCore RCM3360/RCM3370
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