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NSAM265SFA Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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NSAM265SFA Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 58 page  TLEE12378 PRELIMINARY November 1995 NSAM265SRNSAM265SF CompactSPEECH TM Digital Speech Processors General Description The NSAM265SR and the NSAM265SF are members of National Semiconductor’s CompactSPEECH Digital Speech processors family These processors provide Digital Answering Machine (DAM) functionality to embedded sys- tems Both processors are based on the NSAM265 Unless specified otherwise all references to the Compact- SPEECH processor in this document apply to both the NSAM265SR and the NSAM265SF The CompactSPEECH processor integrates the functions of a traditional Digital Signal Processing (DSP) chip and a 16- bit CompactRISCTM embedded Risc processor core The device contains system support functions such as DRAM Controller Interrupt Control Unit Codec Interface MI- CROWlRETM interface WATCHDOGTM timer and a Clock Generator The CompactSPEECH processor operates as a slave pe- ripheral that is controlled by an external microcontroller via a serial MICROWIRE interface In a typical DAM environ- ment the microcontroller controls the analog circuits but- tons and display and activates the CompactSPEECH by sending it commands The CompactSPEECH processor ex- ecutes the commands and returns status information to the microcontroller The CompactSPEECH firmware implements voice compres- sion and decompression tone detection and generation message storage management on-chip speech synthesis for time and day stamp and support for user-defined voice prompts in various languages The NSAM265SR CompactSPEECH supports DRAM ARAM for message storage while the NSAM265SF sup- ports FLASHAFLASH In all other respects the processors are identical The CompactSPEECH implements echo cancellation tech- niques to support improved DTMF tone detection during message playback The CompactSPEECH supports speech synthesis the tech- nology used to create voice prompts from predefined words and phrases stored in a vocabulary The CompactSPEECH can synthesize messages in various languages in addition to the on-chip English vocabulary via the International Vocabulary Support (IVS) mechanism Syn- thesized messages can be stored on an external ROM One ROM can contain several vocabularies in various lan- guages The NSAM265SF can also store vocabularies on FLASH memory DAM manufacturers can thus create ma- chines that ‘‘speak’’ in different languages simply by using other vocabularies For more details about IVS refer to the IVS User’s Manual Features Y Designed around National’s 16-bit CompactRISC proc- essor Y 16-bit architecture and implementation Y 2048 MHz operation Y On-chip DSP Module (DSPM) for high speed DSP operations Y On-chip Codec clock generation and interface Y Power-down mode Y MICROWIRE interface to an external microcontroller Y Storage and management of messages Y Programmable message tag for message categoriza- tion eg Mailboxes InComing Messages (ICM) Out- Going Messages (OGM) Y Skip forward or backward during message playback Y Variable speed playback Y Built-in vocabulary for speech synthesis and support for external vocabularies using expansion ROM Y Multi-lingual speech synthesis using International Vo- cabulary Support (IVS) Y DTMF and single tone generation and detection Y DTMF tone detection during OutGoing Message play- back Y Telephone line functions including busy and dial tone detection Y Real-time clock Y Direct access to message memory Y Supports long-frame and short-frame codecs Y Available in PLCC 68-pin and PQFP 100-pin packages NSAM265SR only Y On-chip ARAMDRAM Controller for 4-Mbit (1M x 4) and 16-Mbit (4M x 4) devices Y 15 minutes recording on a 4-Mbit ARAM Y Supports various ARAM configurations No glue logic required Y Storage of up to 1600 messages Y Production diagnostics support NSAM265SF only Y Supports 4-Mbit and 8-Mbit byte wide FLASH AFLASH devices Y Up to 15 minutes recording on a 4-Mbit FLASH Y Supports various AFLASH configurations No glue logic required for a single AFLASH configuration Y The number of messages that can be stored is limited only by memory size Y Supports prerecorded IVS and OGM on FLASH TRI-STATE is a registered trademark of National Semiconductor Corporation CompactSPEECHTM CompactRISCTM MICROWIRETM and WATCHDOGTM are trademarks of National Semiconductor Corporation C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
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