SC-604

The SC-604 is a low-cost, mixed-signal processor that combines a speech synthesizer with a dedicated slave interface logic, generalpurpose I/O, onboard ROM, and direct speakerdrive in a single package. The computational unit uses a powerful new DSP that gives the SC- 604 unprecedented speed and computational flexibility compared with previous devices of its type. The SC-604 supports a variety of speech and audio coding algorithms, providing a range of options with respect to speech duration and sound quality.

The SC-604 consists of a micro-DSP core, embedded program and data memory, and a self-contained clock generation system. General-purpose periphery is comprised of 16 bits of partially configurable I/O.

The core processor SC-604 is a general-purpose 16-bit microcontroller with DSP capability. The basic core block includes a computational unit (CU), data address unit, program address unit, two timers, eight-level interrupt processor, and several system and control registers. The core processor gives the SC-604break-point capability in emulation.

The processor SC-604 is a Harvard type for efficient DSP algorithm execution, separating program and data memory blocks to permit simultaneous access. The ROM has a protection scheme to prevent third-party pirating. It is configured in 32K 17-bit words.

The total ROM space SC-604  is divided into two areas: