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NSAM266SA Datasheet NSAM266SA CompactSPEECHTM Digital Speech Processor with Serial Flash Interface

Manufacturer: National

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Datasheet Details

Part number NSAM266SA
Manufacturer National
File Size 571.11 KB
Description NSAM266SA CompactSPEECHTM Digital Speech Processor with Serial Flash Interface
Download NSAM266SA Download (PDF)

General Description

The NSAM266SA is a member of National Semiconductor’s CompactSPEECH Digital Speech Processor family This processor provides Digital Answering Machine (DAM) functionality to embedded systems The CompactSPEECH interfaces with National Semiconductor’s NM29A040 and NM29A080 Serial Flash memory devices to provide a cost-effective solution for DAM and Cordless DAM (CDAM) applications The CompactSPEECH processor integrates the functions of a traditional Digital Signal Processing (DSP) chip and the CR16A a 16-bit general-purpose RISC core implementation of the CompactRISCTM architecture It contains system support functions such as Interrupt Control Units Codec interface MICROWIRETM interfaces to a microcontroller and Serial Flash WATCHDOGTM timer and a Clock Generator The CompactSPEECH processor operates as a slave peripheral that is controlled by an external microcontroller via a serial MICROWIRE interface In a typical DAM environment the microcontroller controls the analog circuits buttons and display and activates the CompactSPEECH by sending it commands The CompactSPEECH processor executes the commands and returns status information to the microcontroller The CompactSPEECH firmware implements voice compression and decompression tone detection and generation message storage management speech synthesis for timeand-day stamp and supports user-defined voice prompts in various languages The CompactSPEECH implements echo-cancellation techniques to support high-quality DTMF tone detection during message playback The CompactSPEECH can synthesize messages in various languages via the International Vocabulary Support (IVS) mechanism The NSAM266SA can store vocabularies on either Serial Flash or Expansion ROM memories DAM manufacturers can thus create machines that ‘‘speak’’ in different langua

Overview

NSAM266SA CompactSPEECH Digital Speech Processor with Serial Flash Interface March 1996 NSAM266SA CompactSPEECH TM Digital Speech Processor with Serial Flash.

Key Features

  • Y Y Y Y Y Y Y Y Y Y Y Y Y Designed around the CR16A a 16-bit general-purpose RISC core implementation of the CompactRISC architecture 20 48 MHz operation On-chip DSP Module (DSPM) for high-speed DSP operations On-chip codec clock generation and interface Power-down mode Selectable speech compression rate of 5 2 kbit s or 7 3 kbit s with silence compression Up to 16 minutes recording on a 4-Mbit Serial Flash (more than 1 hour total recording time on four devices) The number of messages t.

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