DAHENG-IMAGE MER-031-860U3C User Manual page 97

Mercury U3V Cameras User's Manual
INPUT2
INPUT3
OUTPUT2
OUTPUT3
Line2/3 is configured as input:
●
Logic 0 input voltage: 0V~+0.6V(Line2/3 voltage).
●
Logic 1 input voltage: +1.9V~+24V(Line2/3 voltage).
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The status is unstable when input voltage is between 0.6V and 1.9V, which should be avoided.
●
When input of Line2/3 is high, input current is lower than 100uA; when input of Line2/3 is low , input
current is lower than -1mA.
●
When LINE2/3 is configured as input, if the corresponding output device is common-anode connected,
pull-down resistor over 1K should not be used, otherwise the input voltage of LINE2/3 will be over
0.6V and logic 0 cannot be recognized stably.
●
Input rising time delay: 2μs (0°C~45°C), parameter description as shown in Figure3- 2.
●
Input falling time delay: <2μs (0°C~45°C), parameter description as shown in Figure3- 2.
●
When Line2/3 is configured as input, internal equivalent circuit of camera is shown as Figure3- 6, for
Line2 as an example.
3.3V
PTC
Figure3- 5: GPIO 2/3 (bidirectional) circuit
Line2
Line3
2
1 3
4
PTC
5
6 8
7
90