AN2407 | Cypress Semiconductor
Hello all... doing a search for PC keyboards made with capsense we stumbled upon a 2007 Cypress application describing the design and implementation of a PC keyboard with a psoc1 that would suit perfectly our needs. Problem is that it can be obtained from only a couple of sources but not from Cypress own web site or the usually known sources of psoc info. Does anyone know the reason for this AN going missing or completely erased from psoc worlds surface? I'd hate to give a try to a project that was flawed in origin. I could not find many mentions to keyboards with a large number of keys even on psoc3 forums either. Has anyone developed such keyboard using capacitive sensing?
P.S. the Application note of reference is AN2407 - Capacitance Sensing - PC Compatible USB / Capsense Matrix Keyboard. It's dated 2007 and it doesn't even have a revision letter or number.