A 50-MHz CMOS geometrical mapping processor

A recently developed microprogrammable, high-resolution, real-time geometrical mapping processor VLSI is presented. The processor computes pixel addresses within the frame-buffer memory according to user-specified geometrical mapping functions. Its architecture permits high-speed operations and library extensions through a combination of elementary functions. It includes a CORDIC function generator, consisting of a one-dimensional pipeline array with high-speed parallel arithmetic circuits, and a pipeline control method. This results in a 50-MHz throughput rate with an accuracy of 20 bits using 1.2- mu m CMOS technology. The processor will be useful in high-definition television (HDTV) systems.>