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PDF NSAM265SF Data sheet ( Hoja de datos )
| Número de pieza | NSAM265SF | |
| Descripción | CompactSPEECH Digital Speech Processors | |
| Fabricantes | National Semiconductor | |
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PRELIMINARY
November 1995
NSAM265SR NSAM265SF
CompactSPEECHTM 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
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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 FLASH AFLASH 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 20 48 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 e g 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 ARAM DRAM 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 TL EE12378
RRD-B30M115 Printed in U S A
1 page  
1 0 Theory of Operation (Continued)
TABLE 1-1 CompactSPEECH States and Transitions
Command
Description
Source State
Configuration and Status Commands
AMAP
Check and Map ARAM
IDLE
CFG
Configure CompactSPEECH
RESET
CVOC
Check Vocabulary
IDLE
GEW
Get Error Word
All states
FR Free Memory
IDLE
GCFG
Get Configuration
RESET IDLE
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GI
GMS
Get Information
Get Memory Status
PLAY RECORD SYNTHESIS
TONE GENERATE IDLE
MEMORY FREE
IDLE
GSW
Get Status Word
All states
GTD
Get Time and Day
IDLE
INIT Initialize System
RESET IDLE
INJ Inject IVS Data
IDLE
MR Memory Reset
IDLE
PDM
Go to Power-Down Mode
IDLE
RDET
Reset Detectors
MEMORY FREE IDLE
S Stop
All states but RESET
SDET
Set Detectors Mask
IDLE MEMORY FREE
SETD
Set Time and Day
IDLE MEMORY FREE
SV
Set Vocabulary Type
IDLE
TUNE
Tune
IDLE MEMORY FREE
Speech Commands
AMSG
Append to Current Message
IDLE
GT Generate Tone
IDLE
P Playback
IDLE
PA Pause
PLAY RECORD SYNTHESIS
TONE GENERATE IDLE
R Record
IDLE
RES
Resume
PLAY RECORD SYNTHESIS
TONE GENERATE IDLE
SAS
Say Argumented Sentence
IDLE
SB Skip Backward
PLAY IDLE
SE
Skip to End of Message
PLAY IDLE
SF Skip Forward
PLAY IDLE
SO Say One Word
IDLE
SPS Set Playback Speed
PLAY SYNTHESIS
IDLE MEMORY FREE
SS Say Sentence
IDLE
SW Say Words
IDLE
VC Volume Control
PLAY SYNTHESIS IDLE
TONE GENERATE
Result State
IDLE
RESET
IDLE
No change
MEMORY FREE
No change
No change
IDLE
No change
IDLE
IDLE
IDLE
IDLE
IDLE
No change
IDLE
No change
No change
IDLE
No change
RECORD
TONE GENERATE
PLAY
No change
RECORD
No change
SYNTHESIS
No change
No change
No change
SYNTHESIS
No change
SYNTHESIS
SYNTHESIS
No change
5
5 Page 
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1 0 Theory of Operation (Continued)
1 9 3 External (International) Vocabularies
Tools for creation of external vocabularies are available
With these tools voice format files can be compressed and
both numbers and sentences can be composed to comply
with the grammar of a specific language
The CompactSPEECH supports external vocabularies
which you can easily tailor for country-specific applications
Every language has its own sentence structure and its own
mechanism for composing numbers Therefore the informa-
tion on the sentence structure and number composition is a
part of the external vocabulary A method IVS has been
developed which uses this information to compose a com-
plete sentence
The information stored in the external vocabulary together
with this retrieval method can be used to compose sen-
tences or phrases in various languages or to implement a
voice menu or command voice prompts The additional vo-
cabulary can reside on either external ROM or
(NSAM265SF only) AFLASH
IVS enables you to have the same program on the controller
to support operation with several languages You have only
to switch to another table containing another language and
the machine ‘‘speaks’’ the new language
The Rule
Before using a specific table set the currently used vocabu-
lary with the command SV (Set Vocabulary Type) Until the
next invocation of this command the selected vocabulary is
used when invoking any synthesis command
IVS Structure
It is possible to have several vocabularies on one external
ROM or FLASH device and the controller can switch be-
tween them
1 10 INITIALIZATION
Use the following procedures to initialize the Compact-
SPEECH processor
Normal Initialization
1 Reset the CompactSPEECH by activating the RESET sig-
nal (See Section 2 2 )
2 Issue a GSW command and check that the EV RESET
bit in the status word is set
3 Issue a GCFG (Get Configuration) command to figure out
what CompactSPEECH knows about your environment
4 Issue a CFG (Configure CompactSPEECH) command to
change the configuration according to your environment
5 Issue an INIT (Initialize System) command to initialize the
CompactSPEECH
6 Issue a GMS (Get Memory Status) command to deter-
mine the size of the memory
(Optional NSAM265SF only) Issue an FR command to
free potentially available memory
7 Issue a AMAP (Check and Map ARAM) 3 command to
test and map the ARAM (Required only on NSAM265SR)
8 Use the TUNE command to set all hardware parameters
Production Test (for the NSAM265SR only)
To save time on the production line of the final product a
set of diagnostics is available Production testing is the pri-
mary use of the AMAP command
The following procedure is recommended
1 Reset the CompactSPEECH by activating the RESET sig-
nal (See Section 2 2 )
2 Issue a GSW command and check that the EV RESET
bit in the status word is set
3 Issue a GCFG (Get Configuration) command to figure out
what CompactSPEECH knows about your environment
4 Issue a CFG (Configure CompactSPEECH) command to
change the configuration according to your environment
5 Issue an INIT command
6 Issue a AMAP 0 command to verify that the correct num-
ber of ARAMs are connected
7 Issue a AMAP 1 command as part of the tests to verify
connectivity to all ARAMs
8 Record and playback a short message (up to 5 seconds)
as part of the tests to verify connectivity and functionality
of the codec interface
9 If you use an external vocabulary choose the appropriate
table and playback a synthesized sentence (e g ‘‘You
have no messages ’’) as part of the tests to check con-
nectivity to the ROM(s) holding the External vocabulary
2 0 Functional Description
2 1 INTRODUCTION
This section provides details of the functional characteris-
tics of the CompactSPEECH processor It is divided into the
following sections
Resetting
The serial interface
Codec interface
Memory (DRAM FLASH) accesses
Memory (DRAM FLASH) configurations
IVS access
Clocking
Power-down mode
Power and grounding
The processor signals mentioned in this section are de-
scribed in Appendix A
2 2 RESETTING
The RESET pin is used to reset the CompactSPEECH proc-
essor
On application of power RESET must be held low for at
least 30 ms after VCC is stable This is to ensure that all on-
chip voltages are completely stable before operation
Whenever RESET is applied it must also remain active for
not less than 30 ms During these 30 ms and for 100 ms
after the TST signal must be high This can be done by
putting a pull-up resistor on the WRO TST pin
The value of MWRDY is undefined during the 30 ms reset
period and for 100 ms after The microcontroller should ei-
ther wait before polling the signal for the first time or the
signal should be pulled high during this period
Upon reset the ENV0 signal is sampled to determine the
operation environment During reset the EMCS ENV0 pin is
used for the ENV0 input signals An internal pull-up resistor
sets ENV0 to 1
After reset the same pin is used for EMCS
System Load on ENV0
The load connected to the ENV0 pin should not allow the
voltage on ENV0 to drop below VENVh
If the load caused by the ENV0 pin exceeds 10 mA use an
external pull-up resistor to keep the pin at 1
11
11 Page | ||
| Páginas | Total 58 Páginas | |
| PDF Descargar | [ Datasheet NSAM265SF.PDF ] | |
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