how tactile switch matrix works ?

[sssuneth]

hello every one

I am looking forward to design a 6x6 switch matrix and wanna connect it to a PIC 16F887.

I am aware how it should be connected and i drew the schematic on eagle its being attached here with.

But i am not too sure how it works.. in terms of sending data and receiving data.
Can some body explain this to me please

 

[Boncuk]

Here is one example:

Let's say button S6 is pressed. That way it connects row1 and column5 which in turn is pulled high via the 10K resistor.

Any other button connects either different rows or lines.

According to your look-up table the MCU then knows which button was pressed.

Boncuk

 

[sssuneth]

Thanks

Is that mean S4 and D3 lines are making a high?

Are both lines inputs to the MCU?