Hi, I have a st7920 graphics lcd, the same one that works with the LCD12864 library at http://www.arduino.cc/playground/Code/LCD12864
I have written a class to run the screen using my shift class over 2 74hc595 registers. I don't use all 16 pins so I want to add a bit of functionality.
1 pin controls a transistor which turns the back light on or off. Thhat works fine but,
I want to use another pin to fully reset the screen. I am just not sure weather xreset is an input or output. And if it is an input the shift register should be able to control it.
I have attached xreset.png which is an excerpt from the data sheet for it.
All it says in the data sheet pin description is 'active - low'
Does this indicate that I can have xreset high for normal use then take xreset low for the reset pulse width to reset the device.
Just want to check before I put 5v into an output.