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Figure 2-2
The button marked with a red box in Figure 2-3. It's used to read the level state
of GPIO ports simultaneously when the directions are IN, and update to
display on the corresponding buttons of State column; The criticality of
high-low level is about 0.78V, it will display HIGH when more than 0.78V, and
display LOW when less than 0.78V.
Figure 2-3
The button marked with a red box in Figure 2-3. It's used to set the level state
of GPIO ports simultaneously when the directions are OUT. When it displayed
as SET_OUT_LOW, click it to set all GPIO ports with Direction OUT to low
level(The low level output is about 0V.); When it displayed as SET_OUT_HIGH,
click it to set all GPIO ports with Direction OUT to high level(The high level
output is about 3.2V-3.5V only under battery mode, the more the battery
capacity, the higher voltage output of the GPIO.)
