LSI signal processor development for communications equipment

A single chip, versatile digital signal processor has been developed, which enables compact and low cost telecommunications equipment realization. The processor architecture has been optimized for real time voiceband signal processing by adopting efficient micro-program control and by integrating a 16 × 16 bit parallel multiplier on a single chip. The processor is fabricated with N-channel MOS technology, and operates at a clock speed up to more than 8 MHz. Any instruction, including multiplication, can be performed within a 250 nanosecond interval. The paper also describes applications to actual voiceband communications equipment to prove the processor effectiveness.