bigal_scorpio
Active Member
Hi to all,
I am planning on using 2 x 74HC595s to drive the columns on a 12 x 12 matrix.
My question is how do I tell the 595s that there are 12 cycles to go through and then start again?
I can see how they are daisychained but from the sheet I don't get how to reset the count from any particular point, in my case after the 12th column has gone high.
I am assuming that I connect one of the outputs of the second 595 to something on the first but which output and where to. The sheet mentions that there are 2 clocks running and that if connected together that one will always be ahead of the other so would I use the 4th output on the second 595 to start the process anew or the 3rd one if one clock is ahead? Baffled.
Al
I am planning on using 2 x 74HC595s to drive the columns on a 12 x 12 matrix.
My question is how do I tell the 595s that there are 12 cycles to go through and then start again?
I can see how they are daisychained but from the sheet I don't get how to reset the count from any particular point, in my case after the 12th column has gone high.
I am assuming that I connect one of the outputs of the second 595 to something on the first but which output and where to. The sheet mentions that there are 2 clocks running and that if connected together that one will always be ahead of the other so would I use the 4th output on the second 595 to start the process anew or the 3rd one if one clock is ahead? Baffled.
Al