NSAM265SF datasheet(11/58 Pages) NSC

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10 Theory of Operation (Continued)

193 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

either

external

ROM

(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

110 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 22)

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 22)

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 (eg

‘‘

You

have no messages ’’) as part of the tests to check con-

nectivity to the ROM(s) holding the External vocabulary

20 Functional Description

21 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 (DRAMFLASH) accesses

Memory (DRAMFLASH) configurations

IVS access

Clocking

Power-down mode

Power and grounding

The processor signals mentioned in this section are de-

scribed in Appendix A

22 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

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