3Rtablet VT-7 Pro, User Manual

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3.3.3 GPIO Specification
VT-7 Pro GPIO Specification Descriptions
PINs Wire
Color Description Logic
Symbol Min TYP. Max Unit Note
GPIO1 Red Digital Input VIH 3 5 25 V Positive Trigger
input
VIL 0 0 0.6 V
GPIO2 While Digital Input VIH 3 5 25 V Positive Trigger
input
VIL 0 0 0.6 V
GPIO3 Green Digital Out-
put VOH 3 - 4 V Internal weak
pull-up
VOL 0 - 0.1 V
GPIO4 Yellow Digital Out-
put VOH 3 - 4 V Internal weak
pull-up
VOL 0 - 0.1 V
GND Black Ground
Note: Black wire (Ground) should be connected to common ground of connecting devices.
3.3.4 GPIO_DEMO Instruction
a) Introduction
This software is only used for developing GPIO functions of device, and it isn't
suitable for factory's standard software.
b) GPIO_DEMO Main Interface
Figure 2-1
c) Introduction of Main Components
The part marked with a red box in Figure 2-2.
1.
Name: means the port names of GPIO.
2.
Direction: means the input or output direction of the ports.
3.
State: means the current level state of the GPIO ports.