Features: ·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 that can be stored is limited only by memory size
·MICROWIRE slave interface to an external microcontroller
·MICROWIRE master interface to Serial Flash memory devices
·Storage and management of messages
·Programmable message tag for message categorization, e.g., Mailboxes, InComing Messages (ICM), Out-Going Messages (OGM)
·Skip forward or backward during message playback
·Digital volume control
·Variable speed playback
·Supports external vocabularies, using Serial Flash or expansion ROM
·Multi-lingual speech synthesis using International Vocabulary Support (IVS)
·Vocabularies available in: English, Japanese, Mandarin, German, French and Spanish
·DTMF generation and detection
·DTMF detection during OutGoing Message playback
·Single tone generation
·Telephone line functions, including busy and dial tone detection
·Call screening (input signal echoed to codec output)
·Real-time clock
·Direct access to message memory
·Supports long-frame and short-frame codecs
·Supports up to four 4-Mbit, or two 8-Mbit, Serial Flash devices
·Supports prerecorded IVS and OGM on Serial Flash
·Available in 68-pin PLCC and 100-pin PQFP packagesPinout
SpecificationsIf Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Temperature under Bias.... 0 to +70
Storage Temperature.... -65 to +150
All Input or Output Voltages
with Respect to GND..... -0.5V to +6.5V
Note: Absolute maximum ratings indicate limits beyond which permanent damage may occur. Continuous operationat these limits is not intended; operation should be limited to those conditions specified under Electrical Characteristics.
DescriptionThe 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 NSAM266SA 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 NSAM266SA 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 NSAM266SA 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 NSAM266SA 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 NSAM266SA 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 languages, simply by using other vocabularies. For more details about IVS, refer to the IVS User's Manual.
NSAM266SA Data Sheet
