Circuit for interfacing a digital signal processor to a serial interface controller

摘要

An interface circuit which connects a Digital-Signal-Processor (DSP) to a serial controller. The interface circuit includes a bi-directional multiplexer which converts the separate address and data busses of the DSP to the multiplexed data and address bus of the serial controller. A timing generator is included for keeping track of the number of clock cycles in the present access. A decoder connected to the timing generator decodes the number of clock cycles and generates the appropriate control signals to both the serial controller and the DSP.