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