SC-614
Speech And Music Processor
Data sheet
© 2003 Sensory Inc.
P/N 80-0210-C
1
Features
Advanced, integrated speech synthesizer for
high-quality sound.
Operates up to 12.32 MHz (performs up to 12
MIPS).
Single-chip solution for up to 6.8 minutes of
speech.
External ROM interface for up to 18.8 hours of
speech.
Supports high-quality synthesis algorithms such
as MX, CX, Simple CX, LX, ADPCM, and
polyphonic music.
Simultaneous speech plus music capability.
Very low-power operation, ideal for hand-held
devices.
Low-voltage operation, sustainable by three
batteries.
Reduced power stand-by modes, less than 10
µA in deep-sleep mode.
Contains 64k byte words onboard ROM (2k
words reserved).
640-word RAM.
64 I/O pins consisting of 40 general-purpose bit
configurable I/O.
8 inputs with programmable pullup resistor and
dedicated interrupt (key-scan).
16 dedicated output pins.
Direct speaker driver, 32
Ω (PDM).
One-bit
comparator
with
edge-detection
interrupt service.
Resistor-trimmed oscillator or 32.768 khz
crystal reference oscillator.
Serial scan port for in-circuit emulation and
diagnostics.
The SC-614 is sold in die form, or 100-pin
LQFP package.
An emulator device is available in a ceramic
package for development (SC-614-P).
Description
The SC-614 is a low-cost, mixed-signal processor that
combines a speech synthesizer, general-purpose I/O,
onboard ROM, and direct speaker-drive in a single
package. The computational unit utilizes a powerful new
DSP which gives the SC-614 unprecedented speed and
computational flexibility compared with previous devices
of its type. The SC-614 supports a variety of speech and
audio coding algorithms, providing a range of options
with respect to speech duration and sound quality.
The device consists of a micro-DSP core, embedded
program, and data memory, and a self-contained clock generation system. General-purpose periphery is
comprised of 64 bits of partially configurable I/O.
The core processor is a general-purpose 16-bit microcontroller with DSP capability. The basic core block
includes 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-614 break-point
capability in emulation.
The processor is Harvard type for efficient DSP algorithm execution. It requires separate program and data
memory blocks to permit simultaneous access. It is configured in 32K 17-bit words.
The total ROM space is divided into two areas:
1. The lower 2K words are reserved by Sensory for the purposes of a built-in self-test
2. The upper 30K is for user program/data
SC-614 Block Diagram
16-Bit
Microprocessor
640-words
RAM
64 KBytes
ROM
TIMER 1
TIMER 2
PLLM
10-Bit
DAC
64 I/O
COMPARATOR
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