http://www.futureelectronics.com/en/Search.aspx?dsNav=Ntk:ManufacturerPartNumberUpshiftedSearch%7c*CY8CKIT%2f-042*%7c1%7c,Ny:True,Nea:True . The status register lesson shows how to get information out of the hardware. The control register works the other way. It allows firmware to generate control signals in the hardware. We are going to use a control register to pick channels in a digital multiplexer and control the brightness of an LED. https://youtu.be/zFRPhGXnhh4