NSAM265SR

NSAM265SR NSAM265SF CompactSPEECH Digital Speech Processors PRELIMINARY November 1995 NSAM265SR NSAM265SF 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 systems Both processors are based on the NSAM265 Unless specified otherwise all references to the Compactwww.DataSheet4U.com 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 16bit CompactRISCTM embedded Risc processor core The device contains system support functions such as DRAM Controller Interrupt Control Unit Codec Interface MICROWlRETM interface 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 on-chip speech synthesis for time and day stamp and support f...