Tendzone TYCHO T 1212/CA - Manual (Page 14)

Choose one GPIO input/output channel number on the left and set the parameters of such selected channel on the right.
The orange button showing certain channel number indicates that such GPIO channel is on, and the gray buttons indicate
that the corresponding GPIO channels are off. Taking the above chart as example, the output channel 1 is on, and the rest
channels are off.
GPIO Enabled indicates whether the settings are effective. Users can set the GPIO electrical level and parameters, and click
“Save” or “Apply” to save such settings; but such operation is only to save the PIN parameters to the device, and only when
the On/Off State is set at “ON”, such settings can become effective.
It is impossible to set several GPIO channels and submit the settings at one time. After setting one GPIO channel, click
“Apply” button to save the settings before setting the next GPIO channel; and click “Save” to save the settings of the GPIO
channel on the current page and exit from the current page.