The DS1481 is a dedicated 1wire timing generator. The device is normally used in conjunction with a parallel port controller to provide the necessary interface to the host processor. Busy signals allow the host processor to perform other tasks while 1wire "timeslots" are completed. The DS1481 also saves the state of D/CLK and RES allowing print spoolers to operate without affecting 1wire communication. DS1481 based devices can be cascaded. The first device's O1/BSY1 and O2/BSY2 connect to the PC