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MSM6679A-110

Voice Recognition Processor

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Contents

Description .......................................................................................................................................... 1

Features................................................................................................................................................ 1

Functional and I/O Diagrams .......................................................................................................... 2

Pin Descriptions ................................................................................................................................. 8

Electrical Specifications ..................................................................................................................... 12

Absolute Maximum Ratings ............................................................................................ 12

Operating Conditions ....................................................................................................... 12

DC Characteristics (VDD = 4.5 to 5.5 V, Ta = -40 to 80˚C) .......................................... 13

AC Characteristics ............................................................................................................ 14

Timing Diagrams .............................................................................................................. 15

Functional Description ...................................................................................................................... 17

Voice Recognition ............................................................................................................. 17

SI Recognition ................................................................................................... 17

SD Recognition ................................................................................................. 20

Name Tag Recording ........................................................................................................ 20

Audio Input Interface ....................................................................................................... 21

Audio Output Interface .................................................................................................... 21

Memory Interface .............................................................................................................. 21

External Voice Synthesis Control ................................................................................... 24

Serial Interface ................................................................................................................... 25

MSM6679A-110 Slave-Mode API .................................................................................................... 26

Command Summary ........................................................................................................ 27

Command Descriptions ................................................................................................... 31

Asynchronous Serial Protocol Example ........................................................................ 44

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

¡ Semiconductor

MSM6679A-110

SI/SD Voice Recognizer, Recorder/Player, and Speech Synthesizer

GENERAL DESCRIPTION

The MSM6679A-110 Voice Recognition Processor (VRP) is a slave-mode device that performs five func-tions: speaker-independent (SI) voice recognition, speaker-dependent (SD) voice recognition, solid-state sound recording, sound playback, and speech synthesis. The highly integrated device also provides an on-chip memory controller, Flash memory interface, analog data conversion, Oki speech synthesizer interface, and pulse width modulation (PWM) sound output. For SI recognition, the MSM6679A-110 contains a vocabulary template in external memory. Pretrained SI vocabularies eliminate the need for laborious training, as usually required by SD products. The memory requirements are dependent on the size of the vocabulary. The MSM6679A110 can tolerate background noise, while providing high recognition accuracy. In its designated operating environment, the device achieves a typical recognition accuracy of >95% (using an Oki-defined test procedure). For SD recognition, the MSM6679A-110 stores SD vocabulary templates, as defined by the user, in external SRAM. The MSM6679A-110 can create SD vocabularies of up to 61 words each, with each word using approximately 50 bytes. In addition to providing voice recognition capabilities, the MSM6679A-110 integrates a solidstate recorder/player, speech synthesis functions, and a tone generator. ADPCM recording/ playback provides high quality sound and efficient memory utilization. The MSM6679A-110 can respond to spoken com-mands, verbally or with tones, via an on-chip speech synthesizer and tone generator. For larger speech-synthesis requirements, the MSM6679A-110 also provides a glueless MSM665x control interface for off-chip speech synthesis. The MSM6679A-110 can interface to any application or personal computer via a serial interface through an open, device-independent serial mode API (SMAPI). To accelerate code development, Oki supplies an evaluation kit, and assembly and C language programs for this product.

FEATURES

• SI recognition

- Up to 20 - 25 words in each vocabulary

- Multiple vocabulary support

• SD recognition

- Up to 61 words in each vocabulary

- Multiple vocabulary support

• Speech synthesis

- Up to 2.3-sec internal and 27.6-sec external speech synthesis on-chip; sample looping and concatenation allows even longer phrases.

- On-chip controller for MSM665x speech synthesizer

- Standard beep tone outputs

- Pulse code modualation (PCM) and

adaptive differential pulse code modualation (ADPCM) voice or soundeffect output

• Speech capture and playback

- 28-kbps ADPCM speech compression

• Serial ASCII command interface

• 6944-Hz audio input sample rate for record and playback

• 10-kHz sample rate for voice recognition

• 200-msec recognition latency

• Flexible memory mapping for EPROM, FLASH, and SRAM

• 32-MHz operation

• Packages: 84-pin PLCC (QFJ84-P-S115) or 100-pin TQFP (TQFP100-P-1414-0.50-K)

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

FUNCTIONAL AND I/O DIAGRAMS

Analog

Input

A/D Interface

Serial-Mode

MSM665x Interface

PWM Output

Serial Interface

IC Reset and Oscillator Inputs

Recognition and

Synthesis Engine

Vocabulary

Memory

Algorithm

Memory

External Memory Control

System

Controller

Figure 1. MSM6679A-110 Block Diagram

ADC0 ~ ADC9

VREF

NAR BUSY

SI SD

STROBE RESOUT

VOICEOUT1

RXD1 TXD1

RES

OSC0 OSC1

AD0 ~ AD7

A8 ~ A15

ROMRD

WRRAM

RDRAM

LOADPGM

ROMPAGE0 ROMPAGE1 RAMPAGE0 RAMPAGE1

A15FLIP

ALE

Serial

Interface

PWM

Output

External

Speech

Synthesis

Control

Memory Interface

Figure 2. MSM6679A-110 Logic Symbol

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

N/C

RAMPAGE1

RAMPAGE0

LOADPGM

N/C

GNDSDSI

BUSY

N/C

ROMPAGE1

ROMPAGE0

STROBE

A15FLIP

N/C

747372717069686766656463626160595857565554

N/C N/C N/C N/C N/C

N/C+

RES

ADC0 ADC1 ADC2 ADC3 ADC4 ADC5 ADC6 ADC7 ADC8 ADC9

AGND

75 76 77 78 79 80 81 82 83 84

10 11

N/C

N/C–

A15

A14

A13

A12

A11

A10

44 1 2 3 4 5 6 7 8 9

AD7

AD6

AD5

AD4

AD3

AD2

AD1

AD0

VOICEOUT1

121314151617181920212223242526272829303132

N/C+

VREF

N/C+

N/C

TXD1

RXD1

GND

OSC0

OSC1

ALE

ROMRD

RDRAM

WRRAM

N/C–

RESOUT

NAR

N/C

Figure 3. MSM6679A-110 84-Pin PLCC Pinout

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

MSM6679A-110 Alphabetic Pin List

AD0

84-pin/

100-pin

34/28

Name

AD1 35/29 AD2 36/30 AD3 37/31 AD4 38/32 AD5 39/33 AD6 40/34 AD7 41/35

A8 43/39 A9 44/40

Name

84-pin/

100-pin

A10 45/41 A11 46/42 A12 47/43 A13 48/44 A14 49/45 A15 50/46

A15FLIP 56/54

ADC0 1/89 ADC1 2/90 ADC2 3/91

Name

84-pin/

100-pin

ADC3 4/92 ADC4 5/93 ADC5 6/94 ADC6 7/95 ADC7 8/96 ADC8 9/97 ADC9 10/98

AGND 11/99

ALE 24/16

AVDD 84/87

Name

84-pin/

100-pin

BUSY 61/60

13,14,80/3,4,82

N/C+

28,51/20,47

N/C–

EA 82/84 ES 30/22

GND

21,64/12,63

LOADPGM

66/66

Name

RAMPAGE0 RAMPAGE1

RDRAM 27/19

RESOUT 29/21

ROMPAGE0 ROMPAGE1

84-pin/

100-pin

67/67 SI 62/61 68/68

RES 81/83

58/56 59/57

NAR 31/23 ROMRD 25/17 OSC0 22/13 RXD1 19/9 OSC1 23/15 SD 63/62

Name

84-pin/

100-pin

STROBE 57/55

TXD1 20/10 VREF 12/2

VOICEOUT1

33/27

WRRAM 26/18

42,83/37,85

VDD

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Figure 4. MSM6679A-110 84-Pin Package Mechanical Drawing

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

N/C

VREF

N/C+ N/C+

N/C N/C N/C

N/C RXD1 TXD1

N/C

GND

OSC0

N/C OSC1

ALE

ROMRD

WRRAM

RDRAM

N/C–

RESOUT

NAR

N/C

AVDDN/C

ADC0

ADC1

ADC2

ADC3

ADC4

ADC5

ADC6

ADC7

ADC8

ADC9

AGND

N/C

100

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22

23 24 25

N/C+

RES

N/C 81

N/C 80

N/C 79

N/C 78

N/C 77

N/C 76

N/C

N/C RAMPAGE1

68 67

RAMPAGE0

LOADPGM

N/C

N/C GND

BUSY

60 59

N/C N/C

ROMPAGE1

ROMPAGE0

STROBE

A15FLIP

54 53

N/C N/C

N/C

VOICEOUT1

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

N/C

A10

A11

A12

A13

A14

A15

N/C–

N/C

Figure 5. MSM6679A-110 100-Pin TQFP Pinout

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Figure 6. MSM6679A-110 100-Pin Package Mechanical Drawing

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

PIN DESCRIPTIONS

Pin #

84-pin/

100-pin

10/98 ADC9

11/99 AGND Analog ground

20/10 TXD1 Output Serial Port Transmit. This is the transmit data line for serial port.

21/12 GND Ground Ground.

22/13 OSC0 Input

23/15 OSC1 Output

24/16 ALE Output

Pin Name

-/1 1/89 ADC0 2/90 ADC1 3/91 ADC2 4/92 ADC3 5/93 ADC4 6/94 ADC5 7/95 ADC6 8/96 ADC7 9/97 ADC8

12/2 VREF

13/3 N/C+ 14/4 N/C+ 15/5 N/C 16/6 N/C 17/7 N/C 18/8 N/C 19/9 RXD1 Input Serial Port Receive. This is the receive data line for serial port.

-/11 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

-/14 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

N/C

Signal Type Description

(not connected) Reserved. This pin is reserved for future use and should be left open.

Analog Input. These ten inputs are tied together and serve as the

Analog input

Reference voltage

Input

(do not connected) Reserved. These pins are reserved for future use and must be left open.

analog input. Signal conditioning, via a bandpass filter and gain circuit, is required before this input.

Analog Ground. This pin provides an analog ground point, allowing independent grounding of the analog and digital circuitry. Separate grounds reduce the impact of digital switching noise on analog sampling accuracy. Analog Reference Voltage. The MSM6679A-110's on-chip A/D converter uses this analog reference voltage when converting an analog signal into digital samples Reserved. These pins are reserved for future use and must be tied to VDD.

Oscillator 0/External Clock. When the MSM6679A-110 uses a crystal oscillator, this input is the oscillator input pin. The pin is then connected to one side of a crystal and load capacitor. When used with an external clock, the external clock is applied to this input.

Oscillator 1. When the MSM6679A-110 uses a crystal oscillator, this output is the oscillator output pin. The pin is then connected to one side of a crystal and load capacitor. When used with an external clock, this output is left unconnected. Memory Address Latch Enable. An external memory latch is controlled by this signal, the address latch enable output.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Pin #

84-pin/

100-pin

25/17

26/18 WRRAM Output

27/19 RDRAM Output

28/20 N/C– Input Reserved. This pin is reserved for future use and must be tied to GND.

29/21 RESOUT Output

30/22 ES Output

31/23 NAR Input

32/24 N/C (do not connect)

-/25,26 N/C (not connected)

33/27 VOICEOUT1 Output

34/28 AD0 35/29 AD1 36/30 AD2 37/31 AD3 38/32 AD4 39/33 AD5 40/34 AD6 41/35 AD7

42/37 VDD Digital Power Power.

43/39 A8 44/40 A9 45/41 A10 46/42 A11 47/43 A12 48/44 A13

Pin Name

ROMRD

-/36 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

-/38 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

Signal Type Description

ROM Read. This is a strobe signal for direct connection to an external

Output

Bidirectional I/O

Outputs Memory Address Bus. These are the upper eight address pins.

ROM's READ input. When asserted LOW, this signal indicates that the MSM6679A-110 is ready to read data from the ROM. RAM Write. This is a strobe signal for direct connection to an external RAM's WR input. When asserted LOW, this signal indicates that the MSM6679A-110 is ready to write data to RAM. RAM Read. This is a strobe signal for direct connection to an external RAM's RD input. When asserted LOW, this signal indicates that the MSM6679A-110 is ready to read data from RAM.

MSM665x Reset. This pin provides a reset signal for an external speech synthesis engine. Flash Bank Control (Extended Segments). This is the control signal for flash memory banking. MSM665x Next Address Request. This pin signals to the MSM6679A-110 that the external speech synthesis engine is ready for another command. Reserved. These pins are reserved for future use and must be left open. Reserved. These pins are reserved for future use and should be left open. Voice Out. This pin is the PWM output for speech synthesis, voice sample playback, and voice prompts. An external integrator must be used to convert this to an analog signal.

Memory Address/Data Bus. These are multiplexed address/data lines for the eight data bits and the lower eight address bits (the upper eight address bits are not multiplexed).

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Pin #

84-pin/

100-pin

49/45 50/46 A15 51/47 N/C– Input Reserved. This pin is reserved for future use and must be tied to GND. 52/48 N/C 53/49 N/C

-/50,51 N/C (not connected) 54/52 N/C 55/53 N/C

56/54 A15FLIP Output

57/55 STROBE Output

58/56 ROMPAGE0 59/57 ROMPAGE1 60/58 N/C (do not connect) Reserved. This pin is reserved for future use and must be left open.

61/60 BUSY Input

62/61 SI Output

63/62 SD Output

64/63 GND Digital Ground Ground.

65/65 N/C (do not connect) Reserved. This pin is reserved for future use and must be left open.

66/66 LOADPGM Output

67/67 RAMPAGE0 68/68 RAMPAGE1 69/69 N/C 70/70 N/C 71/71 N/C (do not connect) 72/72 N/C 73/73 N/C 74/74 N/C

-/75,76 N/C (not connected)

Pin Name

A14

-/59 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

-/64 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

Signal Type Description

Outputs Memory Address Bus. These are the upper eight address pins.

(do not connect)

Outputs

Output

Reserved. These pins are reserved for future use and must be left open.

Reserved. These pins are reserved for future use and should be left open.

Reserved. These pins are reserved for future use and must be left open.

Memory Address A15 Flip. This signal inverts the A15 address signal for 32-Kbyte bank switching on the local memory bus. MSM665x Strobe. This output provides the LOAD signal for an external speech synthesizer. ROM Page Select. These signals select one of four 64-Kbyte ROM pages.

MSM665x Busy. When using an external MSM665x device, this pin monitors the MSM665x BUSY signal and connects directly to the MSM665x BUSY signal output. MSM665x Serial Clock. This MSM6679A-110 output connects to the MSM665x SI input. The SI pin is the MSM665x serial clock input pin. MSM665x Serial Data. This MSM6679A-110 output connects to the MSM665x SD input. The SD pin is the MSM665x serial data input pin.

Load Program. This signal allows the MSM6679A-110 to write data to program memory. When asserted low, this signal should set the program memory in write mode. RAM Page Select. These signals support selection of one out of four RAM pages. Each page is 64kbytes in size.

Reserved. These pins are reserved for future use and must be left open.

Reserved. These pins are reserved for future use and should be left open.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Pin #

84-pin/

100-pin

75/77 76/78 N/C 77/79 N/C (do not connect) 78/80 N/C 79/81 N/C 80/82 N/C+ Input Reserved. This pin is reserved for future use and must be tied to VDD.

81/83 RES Input

82/84 EA Input

83/85 VDD

84/87 AVDD

-/100 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

Pin Name

N/C

-/86 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

-/88 N/C (not connected) Reserved. This pin is reserved for future use and should be left open.

Signal Type Description

Reserved. These pins are reserved for future use and must be left open.

MSM6679A-110 Reset. External logic should assert this power-on reset signal LOW when power is applied to the MSM6679A-110. External ROM Address Select. This control signal enables external ROM execution. This signal is usually connected to ROMPAGE1 and a pullup resistor.

Positive digital supply

Analog power supply

Power.

Analog Power.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

ELECTRICAL SPECIFICATIONS

Absolute Maximum Ratings

Digital power supply voltage Input voltage Output voltage Analog power voltage Analog reference voltage Analog input voltage

Power dissipation

Storage temperature

Symbol Conditions

REF

GND = AGND = 0 V

VAI –0.3 to V

STG

Ta = 85˚C, per package 1300 max.

Ta = 85˚C, per pin 50 max.

— –50 to +150˚C ˚C

ValueParameter

–0.3 to +7.0 –0.3 to VDD +0.3 –0.3 to V

+0.3

–0.3 to VDD +0.3

–0.3 to AVDD +0.3

REF

Unit

1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be restricted to the conditions as detailed elsewhere in this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Operating Conditions

Digital power supply voltage Analog power supply voltage Analog reference voltage Analog input voltage Storage holding voltage Operating frequency Ambient temperature

Fan-out

Symbol

REF

DDH

OSC

Ta — –40 to 85˚C ˚C

N TTL load, AD0 ~ AD7 2

Conditions

= 32 MHz

OSC

VDD = AV

ValueParameter

4.5 to 5.5

AVDD –0.3 to AV

to V

GND

REF

= 0 MHz 2.0 to 5.5

OSC

VDD = 5 V ±10% 32 MHz

MOS load 20

TTL Load, all other outputs 1

Unit

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

DC Characteristics (VDD = 4.5 to 5.5 V, Ta = -40 to 85˚C)

Parameter Symbol Condition

High-level input voltage V

Low-level input voltage V

Output current = 400 mA, applied

High-level output voltage V

to AD0-AD7, ALE, and ROMRD

Output current = 200 mA, for all other I/O Output current = 3.2 mA, applied

Low-level output voltage V

to AD0-AD7, ALE, and ROMRD

Output current = 1.6 mA, for all other I/O

= VDD/0 V, applied to Ain, EA,

Input leak current

Input current

High-level output current I

Low-level output current I

Output leakage current I Input capacitance C Output capacitance C Analog reference power supply voltage

Power consumption I

FLOAT, and RESTART

, I

= VDD/0 V, applied to RES

f = 1 MHz, Ta = 25˚C

REF

= 32 MHz, no load

OSC

Rated Value

Min Typ

[1]

2.2 V

0.85 × V

0.80 × V

–0.3 0.8—Applied to AD0-AD7 –0.3 –0.3 0.2 × V

—Applied to OSC0 —Applied to all other I/O

VDD –0.4 V——

VDD –0.4 ——

— 0.4—

—

— 1/–250—V — 15/–15—VI = VDD/0 V, applied to OSC0 –2 ——VO = 2.4 V, applied to AD0-AD7 –1 10 ——VO = 2.4 V, applied to AD0-AD7

5——VO = 2.4 V, applied to all other I/O

— ——7 —mA4—During voice input — µA10—When voice input is halted —mA7555f

Max

+0.3—Applied to AD0-AD7

VDD +0.3—Applied to OSC0 VDD +0.3—Applied to all other I/O

0.15 × V

1/–1—

——VO = 2.4 V, applied to all other I/O

—5

Unit

µA

µA±2—VO = VDD/0 V

1. Typical condition is 5 V 25˚C.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

AC Characteristics

External Program Memory Control (VDD = 4.5 to 5.5 V, Ta = -40 to 85˚C)

Parameter Symbol Condition Min. Max. Unit

Clock pulse width (OSC) t ALE pulse width t

ROMRD pulse width t ROMRD pulse delay time t

Low address set-up time t Low address hold time t High address delay time t High address hold time t Instruction set-up time t Instruction hold time t

PAD

AAS

AAH

AAD

APH

15.625 ——

36.875 —

177.5 —

10.625 20.625

21.25ns41.25

10.625 20.625CL = 50 pF

15.625 25.625

15.625 25.625 35 —

0 25.625

External Data Memory Control (VDD = 4.5 ~ 5.5 V, Ta = -40 ~ 85˚C)

Parameter Symbol Condition Min. Max. Unit

Clock pulse width (OSC) t ALE pulse width t RDRAM pulse width t WRRAM pulse width t RDRAM pulse delay time t WRRAM pulse delay time t Low address set-up time t Low address hold time t High address set-up time t

High address hold time

Memory data set-up time t Memory data hold time t Data set-up time t Data hold time t

WAD

ARH

AWH

RAD

AAS

AAH

AAD

= 50 pF

15.625 ——

36.875 —

177.5 —

10.625 20.625

21.25 41.25

10.625 ns20.625

15.625 25.625

35 —

0 5.625

15.625 25.625

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Timing Diagrams

tOWt

CLK

ALE

ROMRD

AD0 - AD7

A8 - A15

CLK

ALE

tOWt

PAD

AAS

AAH

PC0 - 7

AAD

PC8 - 15

Figure 7. ROM Read Timing

INST0 - 7

APH

RDRAM

AD0 - AD7

A8 - A15

RAD

AAS

AAH

RAP0 - 7

AAD

RAP8 - 15

Figure 8. RAM Read Timing

INST0 - 7

ARH

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

tOWt

CLK

ALE

WRRAM

AD0 - AD7

A8 - A15

WAD

AAS

AAH

RAP0 - 7

AAD

RAP8 - 15

Figure 9. RAM Write Timing

DOUT0 - 7

AWH

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

FUNCTIONAL DESCRIPTION

Voice Recognition

The MSM6679A-110 performs both SD and SD recognition. SI vocabularies are embedded in the MSM6679A-110. For SD recognition, each recognized phrase must be enrolled in the MSM6679A110’s vocabulary by creating a composite template from multiple recordings of the same phrase. Then the com-posite tempalte is stored in SRAM or FLASH memory. During both SI and SD recognition, the MSM6679A-110 performs the following steps:

1. After external band-pass filtering, the MSM6679A-110 converts the analog signal to PCM samples.

2. The MSM6679A-110 extracts significant features from the sample data by frequency and time-domain analysis.

3. The MSM6679A-110 compares the analyzed input with the reference data for each signal, weighing the significance of similarities according to control software parameters. A score (expressed as distance) is generated for each phrase.

4. he vocabulary phrase that achieves the highest score (or lowest distance) is judged to match the input phrase, assuming that the score exceeds a predetermined threshold.

5. Via a special command, the MSM6679A-110 can also return the scores of the input against all defined vocabulary phrases for SI or SD recognition. This feature allows external host software to select the next best match, if the closest match is not contextually logical.

SI Recognition

Oki supplies the MSM6679A-110 with predefined SI vocabularies which Oki builds from hundreds of utterances by a wide variety of speakers. SI vocabularies are limited to 25 words or less, which allows the MSM6679A-110 to achieve a net accuracy of >95%, even in noisy conditions. SI vocabularies are grouped into sub-vocabularies of ≤15 words, to maintain the highest accuracy. Similar words in any one sub-vocabulary can cause substitution errors. Oki Semiconductor’s standard cellular vocabulary is intended for an automotive environment with a far-talk microphone. This vocabulary may work adequately in other conditions, such as an office or outside, but recognition performance may be degraded.

MSM6679A-110 Cellular SI Recognition Vocabulary

Sub-Vocabulary 1 Sub-Vocabulary 2 Sub-Vocabulary 3

Phrase

Store

Dial 2 Two 2

Delete 3 Three 3

Directory 4 Four 4

— — Five 5 — — Six 6 — — Seven 7 — — — —

Index Phrase Index Phrase Index Phrase Index

1 One 1 Yes 1

Eight 8

Nine 9 Zero Ah

Oh Bh

Stop Ch

Clear Dh

No 2

Cancel 3

—— —— ——

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

MSM6679A-110 Control Vocabulary

Sub-Vocabulary 1 Sub-Vocabulary 2

Phrase

A/C Fan 2 Medium 2

Temperature 3 High 3

Timer 4 Increase 4

Service 5 Decresse 5

Help 6 Set 6

Select 7 Reset 7

— — Cancel 8 — — Clear 9 — — Recall A — — On B — — Help C

Index Phrase Index

1 Low 1

MSM6679A-110 Direction Vocabulary

Sub-Vocabulary 1

Phrase

Down 2

Left 3

Right 4

Formard 5

Reverse 6

Faster 7

Slower 8

Start 9

Stop A

Cancel B

Index

MSM6679A-110 Browse Vocabulary

Sub-Vocabulary 1 Sub-Vocabulary 2

Phrase

Down 2 Previous 6 — — Reset 2 Play 6

Left 3 Select 7 — — Start 3 Lock 7

Right 4 Cancel 8 — — Stop 4 Cancel 8

Index Phrase Index Phrase Index Phrase Index Phrase Index

1 Next 5 Home 9 Set 1 On 5

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

MSM6679A-110 Japanese Navigation Vocabulary

Sub-Vocabulary 1 Sub-Vocabulary 2 Sub-Vocabulary 3 Sub-Vocabulary 4

Phrase

Genzaichi

Jiaku 2 Shita 2 Kakudai 2 Iie 2

Kaisya 3 Hidari 3 Shukushou 3 Ofu 3

Houi 4 Migi 4 Zentai 4 — — Sentaku 5 — — Kaiten 5 — — Yuudou 6 — — Kyori 6 — —

Nabi 7 — — Hosei 7 — —

— — — — Teisei 8 — —

Index Phrase Index Phrase Index Phrase Index

1 Ue 1 Hyoujun 1 Hai 1

MSM6679A-110 Japanese Celluar Vocabulary

Sub-Vocabulary 1 Sub-Vocabulary 2

Phrase

Ofu 2 Ni 2 Zero A

Daiyaru 3 San 3 Sharp B

Tansyuku 4 Yon 4 Star C

Denwacho 5 Go 5 Kakunin D

Kakunin 6 Roku 6 Touroku E

Nabi 7 Nana 7 Rei F

— — Hachi 8 — —

Index Phrase Index Phrase Index

1 Ichi 1 Kyuu 9

SI vocabulary generation starts with collecting reference utterances from ≥400 speakers with:

• An equal mixture of males and females

• Accents from all regions of the country of intended use

• ~15% non-native speakers.

The samples should be generated from a randomly-ordered list, with each word spoken twice and with a dummy word at the beginning and end. There must be >2 sec between each sample for accurate data processing. To provide the audio fidelity required for high-quality recognition training, a DAT recorder, together with the microphone that will be used in the final application, is required. To ensure data integ-rity, data is submitted to Oki after collecting samples from the first 20 speakers for initial screening. If acceptable, then the remaining collection may proceed. If substitution errors are possible, collection of spare words during initial collection is recommended. For example, alternate words to “Stop” and “Top” could be “Halt” and “First.” Collections should contain a wide variety of the background sound conditions that will exist during actual usage. For example, if the collection is for use in an automobile, conditions such as vehicle speed, road conditions, various window opening positions, heater or AC blower speeds and radio volumes should be varied during the collection. The signal-to-noise ratio should be maintained at ≥ 20dB.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

To achieve high accuracy rates, phrase selection, data collection, background initialization strategy, and control software need careful consideration. There are no published standards for recognition accuracy. Oki defines accuracy by:

Accuracy = 100% - E E

RATE

= E

SUB

+ 1/2 E

RATE

REJ

with the following definitions:

Parameters for Recognition Accuracy

Name ConditionSymbol

Substitution Error Most critical type error, e.g., Say "Five", recogrize "Nine"E Rejection Error Word not recognized, opportunity for operator to repeatE Gap Error Word spoken before recognizer readyE Time-Out Error Word length is too longE

Spurious Response Error

SUB

REJ

GAP

TME

Sourd or imvalid word classfied as a valid word

SPU

(i.e., drop handset or speak wong word)

A typical target accuracy of 97% is achieved with a 3% E a 3%E

REJ

rate.

, composed of a 1.5% E

RATE

rate and

SUB

SD Recognition

In SD recognition mode, the MSM6679A-110 can be trained to recognize up to 61 words. The MSM6679A-110 can support multiple speakers by switching vocabularies, but only one speaker’s vocabulary should be active at one time. The end user enrolls a phrase in the MSM6679A-110’s vocabulary by recording the phrase three times or more. The host Micro Controller Unit (MCU) controls the number of times each phrase in enrolled. Generally, higher recognition accuracy is achieved with each additional enrollment. The word set is made more robust by pronouncing each phrase slightly differently during initial enrollment. In addition to enrollment training, adaptive template updating can drive the accuracy towards 100%. The host MCU updates templates by first asking the speaker to confirm a recognized phrase with a “yes” or “no” response, and subsequently updating the template for corresponding words. The use of name tags (see next paragraph) facilitates this process.

Name Tag Recording

To facilitate SD recognition, the MSM6679A-110 supports recording and playback of name tags. Name tags are used to confirm correct responses in SD recognition. For example, in a phone dialer application, the user associates a “name” (which is recorded into memory) with a phone number. The MSM6679A-110 then plays back the name tag so that the user can verify that the recognized phrase is the correct one. The VRP stores names tags in memory using an ADPCM compression algorithm with 28 kbps of speech. The length of a name tag is controlled with a command from the users host MCU program. The maximum number of name tags possible is 61, but the actual number is dependent upon record time and memory available. See the section on memory interface for more detail.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Audio Input Interface

A critical item for high-accuracy speech recognition is correct design of the audio input circuit. A circuit with appropriate gain and frequency responses must be placed between the microphone and MSM6679A-110’s A/D input. Oki recommends input gain and a band pass filter with the following characteristics:

• Four pole Chebyshev high-pass filter, 3 dB point at 225 Hz

• Dual-pole low-pass filter, 3 dB point at 4250 Hz

• Midband gain of 46 dB at 1000 Hz The above gain and filter characteristics are obtained by using a rail-to-rail quad CMOS op-amp and one-half supply rail splitter to bias the input signal at 2.5 V nominal. The MSM6679A-110 uses multiple analog inputs to improve sampling quality. An on-chip analogy to digital (A/D) conversion unit transforms the analog signal to a digital data stream.

Audio Output Interface

The MSM6679A-110 also provides the VOICEOUT1 PWM output. The MSM6679A-110 uses ADPCM to generate voice or sound-effect output. ADPCM represents an improvement over conventional PCM techniques in that it adaptively changes the quantizer step (scale factor) to suit the waveform being encoded. The result is more efficient memory usage with no loss of quality. Careful selection of the components for internal and external output filters and amplifiers is recommended. An incorrect choice would impair the original quality. This consideration equally includes:

• Careful separation of analog and digital lines

• Grounding of analog lines at both ends

• Further adequate separation from high-speed digital circuits to avoid distortions thereof

Memory Interface

The memory control section manages RAM and/or ROM devices in two 64-Kbyte memory spaces, in conjunction with internal memory for voice templates and working memory. Some versions work with no external memory, some have some external RAM, some use only external EPROM, and some use external memory in conjunction with both internal ROM and RAM. The MSM6679A-110 requires a minimum of 32 Kbytes SRAM and 16 Kbytes ROM. The following table shows vocabulary sizes and playback facilities for various configurations.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Typical Configurations

MSM6679A-110

Sound Playback

(sec)

Internal

[2]

2.3 9.2 OK — OKController

[2]

2.3 — OK — OK

61 2.3 36.8 OK — OK — —

[2]

1.15 OK — — 16K — 32K

MSM665x

MSM6679A-110

Playback

[1]

External EPROM

Interface

Speech Record

MSM6679A-110

Speech

Playback

Memory Size

64K — 32K

— 128K 32K

(bytes)

Flash SRAM

64-384K

Application

Telephone Dialer

Computer Peripheral Minimum Configuration

Recognition

Vocabulary

(Words)

SI SD

25 61 50 61 25 61 2.3 27.6 OK OK OK 50 61 2.3 18.4 OK OK OK 75 61 2.3 — OK OK OK

100 61 2.3 — OK OK OK

[3]

12 61

1. Phrase chaining features usually permit much longer overall playback durations; not including external speech synthesizer.

2. SD recognition vocabularies are volatile in these configurations.

3. Per download. Vocabulary swapping by host permits unlimited vocabulary size.

The MSM6679A-110 supports up to 64 Kbytes of RAM per bank, and up to 64 Kbytes of ROM per bank in separate memory spaces. The 8-bit data bus is multiplexed with the lower eight address bits; the upper eight address bits are not multiplexed. To demultiplex the address and data bits during all read and write cycles, the MSM6679A-110 requires an external octal latch, such as the 74H373. The MSM6679A-110’s Address Latch Enable (ALE) signal controls the octal latch. For accessing the ROM and RAM address spaces, the MSM6679A-110 provides the separate Write RAM (WRRAM), Read RAM (RDRAM), and ROM Read (ROMRD) signals. The RDRAM and ROMRD signals connect directly to Output Enable (OE) control signal inputs on the RAM and ROM, respectively. The WRRAM signal connects directly to the Write Enable (WE) control signal input on the RAM. The following diagrams show the memory maps for the MSM6679A-110. In all MSM6679A-110 memory maps, the DL data memory space must be in RAM. The DH data memory space and PH program memory space can either be implemented in ROM, EPROM, FLASH, RAM, or PROM. In standalone applications, flash memory can be used for recording and subsequent playback of voice prompts (e.g., the user’s name) and user sounds (e.g., DTMF dial tones, etc.). Figure 10 shows the configuration for writing to flash memory used when writing SD templates or when flash is used for data memory.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

FLASHProgram Memory Data Memory

00000

BFFF

C000

FFFF

MSM6679

Internal

Program

Memory

PHH

00000

03FFF

04000

07FFF

08000

08FFF

0C000

0FFFF

10000

13FFF

14000

17FFF

18000

18FFF

1C000

1FFFF

00000

07FFF

08000

0FFFF

Figure 10. MSM6679A-110 Program/Data Memory Map (LOADPGM = “0”)

Figure 11 shows the memory map during all other modes of operation.

FLASHProgram Memory Data Memory

00000

BFFF

C000

FFFF

MSM6679

Internal

Program

Memory

PHH

00000

03FFF

04000

07FFF

08000

08FFF

0C000

0FFFF

10000

13FFF

14000

17FFF

18000

18FFF

1C000

1FFFF

00000

07FFF

08000

F3 S3

0FFFF

00000

07FFF

08000

0FFFF

10000

17FFF

18000

1FFFF

00000

07FFF

08000

0FFFF

10000

17FFF

18000

1FFFF

SRAM

S2 Hidden

SRAM

Figure 11. MSM6679A-110 Program/Data Memory Map (LOADPGM = “1”)

Figure 12 shows the details of the external memory allocation of the MSM6679A-110.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

FLASH

00000

SI First (F509*)

07300

SD First

07D80

NTP First

Name Tag Block Address

08000

10000

Name Tag Data

18000 SI Last

(F501*)

1F900 SD Last

1FD80 NTP Last

1FFFF

*Denotes commands to select blocks

000

100

200

2F6

2FB

2FF

FLASH

Reserved

04AD0

Default Working SD

Templates

05480

Working Name Tag

Pointer Table

05700

Alternate SD Templates

08000

Down load RAM Bank

0F300

10000

(F510*)

Alternate SD Templates

Reserved

18000

Buffer RAM Bank (F520*)

1F300

Reserved

1FFFF

Figure 12. MSM6679A-110 External Memory Map

External Voice Synthesis Control

The MSM6679A-110 is capable of interfacing to the MSM665x family of Oki ROM, OTP, or external EPROM speech synthesizers, allowing for up to 260 seconds of high-quality voice and sound effects. The following table indicates the speech capabilities of the MSM665x family.

MSM665x Family Characteristics

= 16.0 kHz f

SAM

[2]

= 32.0 kHz

SAM

>8 minutes

Type

MSM6650

Data ROM Capacity

64 Mbits

[3]

[1]

= 4.0 kHz f

SAM

>1 hour >40 minutes

Maximum Speech Duration

= 6.4 kHz f

= 8.0 kHz

SAM

>30 minutes >15 minutes MSM6652 288 Kbit 16.9 sec 10.5 sec 8.4 sec 4.2 sec 2.1 sec MSM6653 544 Kbit 31.2 sec 19.5 sec 15.6 sec 7.8 sec 3.9 sec

MSM66P54

[4]

1 Mbit 63.8 sec 39.9 sec 31.9 sec 15.9 sec 7.9 sec MSM6654 1 Mbit 63.8 sec 39.9 sec 31.9 sec 15.9 sec 7.9 sec MSM6655 1.5 Mbit 96.5 sec 60.3 sec 48.2 sec 24.1 sec 12.0 sec

MSM66P56

[5]

2 Mbit 129.1 sec 80.7 sec 64.5 sec 32.2 sec 16.1 sec MSM6656 2 Mbit 129.1 sec 80.7 sec 64.5 sec 32.2 sec 16.1 sec MSM6658 4 Mbit 258 sec 161.4 sec 129.1 sec 64.5 sec 32.2 sec

1. Actual ROM area in MSM6652, MSM6653, MSM6654, MSM6655, and MSM6656, MSM6658, MSM66P54, MSM66P56 is smaller by 22 Kbits.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

2. Longer speech patterns can be created by chaining and repeating existing speech samples.

3. Via external ROM only (no on-chip ROM available).

4. One-Time-Programmable (OTP) version of MSM6654. See the MSM66P54 data sheet for more information.

5. One-Time-Programmable (OTP) version of MSM6656. See the MSM66P56 data sheet for more information.

The MSM665x interface consists of the following signals:

• BUSY - Asserted LOW during MSM665x device playback. The MSM6679A-110 F50Bh and

F10100xxh commands select this signal for MSM665x command polling.

• NAR - Next Address Request status signal. By default, the MSM6679A-110 uses this signal to

poll commands to the MSM665x. The F51Bh, F480h, and F440h commands select NAR for polling.

• SI - Serial Input Clock.

• SD - Serial Data Out.

• STROBE - Initiates speech synthesis.

• RESOUT - Initializes device when asserted LOW. The MSM6679A-110 F480h command

generates this signal.

Serial Interface

The MSM6679A-110 supplies a serial interface suitable for connection to an RS-232C serial port buffer or equivalent. The serial interface uses one MSM6679A-110 input (RXD) and one MSM6679A-110 output (TXD). The interface operates at 9600 Baud with:

• 8 data bits

• 1 start bit

• 1 stop bit

• No parity

• No handshake

A host processor sends serial ASCII commands to the MSM6679A-110 and receives serial ASCII responses based on voice input responses.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

MSM6679A-110 SLAVE-MODE API

This section describes the slave-mode Applications Protocol Interface (API) between a host MCU and the MSM6679A-110. The slave-mode API offers the following features:

• Direct slave-mode control voice recognition, sound recording and playback, and sound

synthesis

• Serial port interfaces

• Simple procedures for downloading and uploading data

• ASCII format

• Comprehensive return codes and error reporting

The host MCU selects the active speech recognition vocabulary, speech responses, and controls all actions required to implement an interactive voice response system. The MSM6679A-110 performs speech recognition, based on the vocabulary selected by the host, and returns digital codes representing the most probable match of the current utterance to an individual utterance in the selected vocabulary. The MSM6679A-110 can also respond with “name tags.” Name tags can be fixed words, phrases or sound effects, or can be words, phrases or sound effects that have been interactively recorded by the user. The API supports serial interface. The MSM6679A-110 returns each response using the same interface through which the most recent message was received. The user can thus connect and use both interfaces. For all messages, the serial interface represents each 8-bit value with two hexadecimal digits coded in ASCII. When downloading and uploading data, the MSM6679A-110 uses a stream of 8-bit binary values. The serial-mode interface uses a 9600-baud UART with 1 start bit, 8 data bits, and 1 stop bit. There is no parity or handshaking. Serial-interface messages are of variable length, but consist of an even number of bytes. The serial interface echoes all received ASCII characters immediately back to the host MCU. Messages are of variable length. All messages consist of an even number of bytes. Opcodes consist of exactly four bytes, with values between F000h and FEFEh. Operand bytes may take values from 0000h to FFFFh. The MSM6679A-110 issues a return code for many of the host commands. The return code generally consists of the same opcode, followed by data indicating success of failure of the operation. Opcodes are organized into the following categories:

• Purge

• Set parameter

• Initialize

• Recognize

• Speak

• Request

• Record

• SD recognition control

The following tables summarize available opcodes and provide detailed descriptions of the opcode functions.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Command Summary

Function

Purge

Set parameter

Initialize

Recognize

Speak

Request

Opcode (Hex) Description

F000 Clear MSM6679A-110 input stack F102 xxxx

F103 xxxx F104 xxxx F11x F12x F130 xxxx F440

F2xx mod 80 F2xx mod 40 F2xx mod 20 F2xx mod 10 F2xx mod 8 F2xx mod 4 F2xx mod 2 F2xx mod 1

F300 F301 to F33F F340 F341

F342 F343 F344

F351 F361

F371

F401 to F43D F441 to F47C F47E F47F F480

F481 - F4FF F50B F51B FE03 to FEFE

F500 F501 F510

F520 F522 F513

Set SP/SI origin to xxxx. Set SD origin. Set triggering origin. Set IRQ level to IRQ x. Set SD SP table to table x. Select triggering table. Set ISA mode.

Initialize background estimation. Wait for F3h command after each response. Beep after each triggered utterance Reserved Set speech response level to default. Send acknowledge after each speech output response. Only detect triggers. Initialize SD parameter table and name tags.

Stop listening (recognition). Start SI recognition. Start SD recognition. Sort SD recognition distances, return index to utterance with least distance. Update SD enrollment. Request recognition parameter upload to host. Sort SD recognition distances, return index and distance to utterance with least distance Sort SD recognition distances, return all distances. Sort SD recognition distances, return minimum and maximum energy values. Sort SD recognition distances, return all energy values and distances.

Play back name tag from external memory. Play back sound from internal memory. Play 50-ms beep. Pause for 0.2 sec. Initialize MSM665x IC, set MSM665x busy mode OFF, select FLASH SI recognition. Play back one of 127 phrases in external MSM665x device. Set MSM665x busy mode ON. Set 6654 NAR mode Set output volume (03h = minimum, FEh = maximum).

Status request. Select last FLASH bank for SI recognition. Select download RAM bank for speaker independent/signal processing (SI/SP) template area. Select buffer RAM bank for SI/SP. Copy download RAM bank to buffer RAM bank Save download RAM bank templates in first FLASH. (8000 - F2FF)

Default (Hex)

— 8000

4A00 F100 0005 F123 0101, 0202... Disabled.

Disabled. Disabled. Disabled. Disabled. Enabled. Enabled. Disabled. Load from first FLASH.

— — — —

— — —

— —

—

— — — — —

— OFF ON FE80h

— F509 F509

— — —

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Function

Request

Record

SD Recognition Control

Opcode (Hex) Description

F514

Get download RAM bank templates from the first FLASH (8000 - FFFF)

F515

Save download RAM bank templates is last FLASH (8000 - F2FF)

F516

Get download RAM bank templates from last FLASH

(8000 - FFFF)

F502....

F503 xxxx F504 F505 F506 F507 F517 F508 F518 F509

F101 00xx F105 F106 F50A F50C F51C

Download/upload.

Select/jump.

Retrieve MSM6679A-110 firmware revision.

Initialize background (BG) noise level.

Retrieve vocabulary and trigger table revision number.

Save SD templates from download RAM to first FLASH.

Save SDR templates in last FLASH. (4A00-547B→F300-FD7F)

Recall SD templates from first FLASH to download RAM.

Get SDR Templates from last FLASH (F300-FD7B→4A00-547B)

Select first FLASH bank for SI recognition.

Set name tag length, set MSM665x busy mode ON.

Set name tag record origin

Set name tag record end

Clear name tag table in SRAM (5480 - 56FF).

Recall last saved name tag table.

Recall name tag pointers from last FLASH

(FD80-FFFF→5480-56FF) F50D F51D F50E F50F FA01 ~ FA3D

F6xx F9xx FB00 FC00 F521

Save name tag table from SRAM to FLASH.

Save name tag pointers in last FLASH (5480-56FF→FD80-FFFF)

Set record volume high.

Set record volume normal (default).

Record name tag 01h - 3Dh.

Set SD pointer to segment xxh.

Search for SD utterance xxh.

Enroll SD utterance selected by search command (F9xx).

Erase utterance from SD vocabulary.

Clear SDR table (4A00 - 547B)

Default (Hex)

—

— — 3136 — 3330 — — — — F509

0051 0000 01FF — — —

— — F50F F50F —

— — — — —

Response Summary

Command

F101h 00 tm F102h AdH AdL

Result after Parameter Set

F103h AdH AdL F104h AdH AdL F11Xh F12Xh

F280h F240h F220h

Initialization Acknowledgment

F210h F208h F204h F202h F201h

Speech Ack F400h Speech acknowledgment.

Operands Description

Record time = tm*14 msec. High and low bytes of SP/SI origin address. High and low bytes of SD origin address. High and low bytes of triggering origin address. IRQ Xh selected. SP table Xh selected.

Invalid message received. Sample data over-run. 32-Kbyte block boundary violation error. Unclassified download/upload error. Divide-by-zero error. Select/jump error. Invalid SP header or table. Reserved.

[1]

[2]

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Response Summary (Continued)

Command

[3]

Status

SI Recognition

[5]

Result

SD Recognition Result

Vector Upload

Trap Error Codes

Record Response

Operands Description

F500h F501h F520h F540h F560h F580h F5A0h F5C0h F5E0h F5F0h

F600h F6Utt F6 Utt Dst1H Dst1L...DstNH DstNL F6 Utt EminH EminL EmaxH EmaxL F6 Utt Dst1H Dst1L...DstNH DstNL EminH EminL EmaxH EmaxL

MSM6679A-110 ready. Operation complete. Operations complete; MSM6679A-110 disabled (vocabulary 0). MSM6679A-110 waiting for start command. MSM6679A-110 waiting for end trigger. MSM6679A-110 processing recognition. Download/upload in progress. Download/upload complete. Select/jump complete. Speak output in progress.

Aborting SI listen mode. Utt = utterance ID. Utterance ID, high/low byte of distance to utterance 1...utterance N. Utterance ID, high/low byte of min. and max. energy value, Utterance ID, high/low byte of distance to utterance 1...utterance N, high/low byte of minimum energy value, high/low byte of

maximum energy value. F63Ah F63Bh F63Ch F63Dh F63Eh F63Fh

F700h F73Eh F73Fh F740h

Trigger detection code (see init command).

Rejection: utterance too loud.

Rejection: utterance too long.

Rejection: utterance begins too soon.

Rejection: bad signal/noise ratio.

Rejection: reason uncertain.

Aborting SD Listen mode. After SD utterance search: not found.

Rejection.

Sort completed. After SD utterance search: empty.

Rejection: MSM6679A-110 SD memory full/empty. After SD

utterance search: in use. F341h F7Utt F344h F7Utt DstH DstL F351h F7Utt Dst1H Dst1L... DstNH DstNL F361h F7Utt EminH EminL EmaxH EmaxL F371h F7Utt Dst1H Dst1L... DstNH DstNL EminH EminL EmaxH EmaxL

F743h 0000h F743h NH NL V1H V1L...VNH VNL

F801h F802h F804h F808h F810h F820h F840h F880h

Utt = Utterance ID triggered.

Utterance ID, high/low byte of distance.

Utterance ID, high/low byte of distance to utterance 1...

utterance N.

Utterance ID, high/low byte of minimum energy value,

maximum energy value.

Utterance ID, high and low byte of distance to utterance 1...

distance to utterance N, high and low byte of minimum energy

value, maximum energy value.

Upload failure.

High/low bytes of length of vector, V, high/low byte of first V...Nth V.

Reserved.

Invalid SP header or table.

Select/jump error.

Divide-by-zero error.

Unclassified download/upload error.

Memory full; 32-Kbyte block boundary violation error.

Sample data over-run.

Invalid message received. FA00 Record complete.

[4]

[1]

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

1. Sample data overrun issued when real-time SP in Listen mode cannot keep up with incoming samples, i.e., if the A/D signal input routine overwrites a sample data buffer before it is fully processed.

2. This acknowledge is sent only if Init command 1111 0010 xxxx x1xx (F2 xxxx x1xx) is set to enable acknowledgments.

3. These messages are sent in response to a request command (F5XYh) from the host.

4. Upload/download in progress, acknowledging load request immediately before data transfer. If in response to an N-byte download request, the MSM6679A-110 then receives N bytes (if N is even, or N+1 if N is odd) of data from the host. If N is odd and N+1 bytes are received, only N bytes are written to MSM6679A-110 memory. If in response to an upload, the MSM6679A-110 then sends N bytes (if N is even, or N+1 if N is odd) of data to the host.

5. If an utterance was recognized, XYh is the utterance identity or class number, and additional parameters may be appended, if requested in the SI Recog (F3XYh with X=0...3) command. Otherwise, XYh indicates various results as detailed.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Command Descriptions

Purge

Operand

F000

Set Parameter

Operand

F102h XXYYh

F103h XXYYh

F104h XXYYh

Purge MSM6679A-110 Input Stack. This command clears the MSM6679A-110 input stack of commands that are waiting to be executed. Commands already in progress, such as a pending MSM6654 poll action, are not affected. It does not affect the MSM6679A-110 output stack.

Description

Set SP/SI Recognition Origin. Prior to SD or SI recognition, address pointers must be set to point at the SP or SI recognition parameter tables.This command sets the starting address of SP and SI recognition parameter tables. This address is the location of the first word of a header that contains pointers to one or more individual SP/SI tables. XXYYh = high (XXh) and low (YYh) bytes of requested address. The MSM6679A-110 uses and returns an even address outside the MSM6679A-110 work space that is as near as possible to the requested address. Leave this parameter at its default value unless you are using an Oki custom SI vocabulary and are instructed to alter SP/SI recognition origin.

Default SP/SI origin: 8000h

[2]

Set SD Recognition Origin origin address at the starting address of the current SD recognition parameter table. This command may be used to select among mul-tiple RAM-resident SD vocabulary tables. XXYYh = high (XXh) and low (YYh) bytes of requested address. The MSM6679A-110 uses and returns an even address outside the MSM6679A-110 work space that is as near as possible to the requested address. Leave this parameter at its default value unless you are using an Oki custom vocabulary and are instructed to alter SD recognition origin. The table length is 0A7Ch bytes.

Set Triggering Origin. This command sets the starting address of triggering parameter tables. This address is the location of the first word of a section of data memory containing one or more contiguous triggering parameter tables. XXYYh = high (XXh) and low (YYh) bytes of requested address. The MSM6679A-110 uses and returns an even address outside the MSM6679A-110 work space that is as near as possible to the requested address. Leave this parameter at its default value unless you are using an Oki custom SI vocabulary and are instructed to alter triggering origin.

. This command sets the SD

Default SD origin: 4A00h

Default triggering origin: F100h.

Return ValuesDescription

None

Return Values

F102h XXYYh = High (XXh) and low (YYh) bytes of resultant address.

If a valid header is not found at the resultant address, the MSM6679A-110 immediately sends response code: F802h = Invalid SP/SI header.

F103h XXYYh = high (XXh) and low (YYh) of resultant address.

F104h XXYYh = high (XXh) and low (YYh) bytes of resultant address.

[1]

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Set Parameter (Continued)

Operand

Set IRQ Level. This command requests direction of host interrupts to IRQ Y. The MSM6679A-110 then selects IRQ Z,

F11Yh

F12Yh

F130h VN TN

F440h None. Default is off.

where Z is the nearest legal value to Y. Legal IRQ values are any from the set {5 (default),A,B,C}.

Set SD Recognition SP table. This command sets the SP parameter table number to be used in processing speech input during SD Recognition. The MSM6679A-110 selects SP table number Z, where Z is the nearest valid value to Y. By default, the MSM6679A-110 selects SP table 3 until this command is issued. This command selects SP parameters only, and does not select among multiple RAM-resident SD vocabulary tables, which can be independently selected by the Set SD Origin command (F103h). After setting the table number and returning the resultant value, the MSM6679A-110 checks the validity of the SP header. If the header is invalid, an error message is returned. Set this value to (NSI +1), where NSI is the number of SI subvocabularies.

Select Triggering Table. This command selects triggering table TN for use with SP table VN. Valid values for VN and TN are between 01h and 0Fh. Leave this parameter at its default value unless you are using an Oki custom SI vocabulary and are instructed to alter the triggering table.

Set ISA Mode. This command sets the port configuration for the ISA bus.

Description

Default IRQ level: 5

Default SP table: 3.

Return Values

F11Zh = IRQ Z selected.

F12Z = SP table Z selected.

If the SP header is invalid, a second message follows: F802h = Invalid SP header.

F130h f(VN) f(TN) = Triggering table selected. Default = 0101, 0202, 0303...

[1]

1. Return value is actual parameter value which may not equal the set parameter value.

2. See also F6XY

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Initialize

F2xx Bit

Values

Power-On/

Reset Value

Action Return Value

After power-on, the MSM6679A-110's mode corresponds to that after issuing a F20C command. This mode may NOT be the optimum condition for most situations, so the user is advised to carefully understand the desired condition and develop a suitable command for the application at hand. In addition, ensure that unwanted bits do not get set or reset when attempting to set individual conditions. The conditions selected are based on the XXh values associated with the last F2 command issued.

Background Noise Initialization. When set to 1, the MSM6679A110 starts a 500-ms background noise initialization. When set to 0, the MSM6679A-110 does not perform background noise initialization. The MSM6679A-110 requires this command prior to recognition for noise vector subtraction during the utterance sampling period. Use the background initialization command whenever there is a

F501 = Background initialization complete

change in the background noise level. For example, sample the noise signature in a vehicle at rest and moving at 35 MPH with its windows rolled down. The quality of a phone line connection can

1xxx xxxx Cleared

also vary from call to call. The host MCU must implement a strategy as to when to issue a background initialization command. In a vehicle, the host MCU could monitor the vehicle speed, fan speed, radio volume, etc. Alternatively, the host MCU could issue this command each time a new recognition session starts or a new line connection is established. However, the 0.5-sec sample period could degrade

F2XY = Initialization acknowledge.

[1]

system responsiveness if used too frequently. A zero in this bit location during the F2XXh command will not cause an initialization. The F505h command causes the same initialization sequence.

Wait for Recognition Command/Auto Restart SI Recognition. When set to 1, the MSM6679A-110 waits for a recognition command after each response. When set to 0, the MSM6679A-

x1xx xxxx Cleared

110 auto-restarts SI recogni-tion after each response. This bit should be set to 1 when an action is to be taken immediately after an utterance. Auto-restart recognition is the

F2XY = Initialization acknowledge.

[1]

desired mode during digit string recognition, automated tape testing of digits, or in demonstrations where continuous recognition is desired.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Initialize (Continued)

F2xx Bit

Values

Power-On/

Reset Value

xx1x xxxx Cleared

xxxx 1xxx Set

xxxx x1xx Set

xxxx xx1x Cleared

xxxx xxx1 Cleared

Action Return Value

Beep After Each Voice Trigger. When set to 1, the MSM6679A-110 beeps after each voice trigger. When set to 0, the MSM6679A-110 does not beep after each voice trigger. These beeps do not cause a F400h message to be issued to the host MCU. When set to 1, the MSM6679A-110 beep can help a user avoid speaking before the MSM6679A-110 is ready. This mode is normally used with a digits vocabulary to pace the user and confirm each utterance reception. Instead of using beeps, an external MSM665x speech synthesizer can repeat digits as they are recognized. However, some users find the number repetition annoying. Therefore, firmware could repeat digits during initial usage and switch to beep mode later. Typically, performance improves with time as users learns to speak with the correct enunciation and volumes. The MSM6679A-110 in this case trains the user. Note that the host MCU can also make the MSM6679A-110 beep with the F47Eh command.

Set Output Volume. When set to 1, VOICEOUT1 sound output level is set to half of full volume (80h). When set to 0, voice output level is unaffected. MSM6679A-110 sound output volume can also be set at any level on a continuous scale from 00h to FEh (low to high) with the FEXXh command. The MSM665x speech synthesizer has four discrete sound output volumes, corresponding to 0h - 20h, 21h 40h, 41h - 80h, and 81h - FEh.

Send Response Code After Sound Output. When set to 1, the MSM6679A-110 issues an acknowledge response (F400h) when sound output is completed. When set to 0, the MSM6679A-110 does not issue an acknowledge response when speech response is completed. Automatic beeps after voice triggers do not cause an F400h command to be issued.

Trigger Detection Only. When set to 1, the MSM6679A-110 does not sort SI vocabularies for the best match, instead returning F63Ah code when an utterance has been detected. When set to 0, normal recognition is performed. When this bit is set to 1, the host MCU can use the F343h command to upload the recognition parameter vector, so that the host can perform independent processing.

Clear SD Recognition and Name Tag RAM. When set to 1, the MSM6679A-110 initializes the SD parameter table. When set to 0, existing SD parameters are preserved. After this bit is set to 1, all SD training and name tag pointers are erased. Use this command to start training for a new user. If the old name tags are to be retained, the F50Ch command can recall old name tags from FLASH. To set up for a blank SD and name tag table at the next power-on, issue the command sequence F201h F507h.

F2XY = Initialization acknowledge.

[1]

F2XY = Initialization acknowledge.

[1]

F2XY = Initialization acknowledge.

[1]

F2XY = Initialization acknowledge.

[1]

F2XY = Initialization acknowledge.

[1]

1. See the Response Summary table earlier in this section for a complete description of the XY codes in initialization acknowledgment messages.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Recognize

Opcode

Stop Listening. This command causes the

F300h Aborting SI Listen mode.F600h

F301h F33Fh

F340h

F341h, F344h, F351h, F361h, F371h

MSM6679A-110 to exit SI or SD Listen mode, whichever was active.

Start SI Listen Mode. For all the following opcodes, the MSM6679A-110 per-forms SI recognition on incoming utterances, using SI vocabulary Y. The vocabulary Y is identified by one of 15 sets, thus Y = 1h ~ Fh.

F30Yh

F31Yh

F32Yh

F33Yh

Start SD Listen Mode. When an utterance is captured, it is analyzed and converted to a "recognition parameter vector." The host may then command the MSM6679A-110 to use this vector in various ways (e.g., Sort, Update, or Recognition Vector Upload).

SD Recognition Sort. These commands sort the distances between the recognition parameter vector and the reference vectors for the utterances in the current SD vocabulary.

F341h

F344h

F351

F361h

Return recognized phrase using vocabulary number Y.

Return recognized phrase and distance table for vocab Y.

Return recognized phrase and energy value for vocab Y.

Return recognized phrase, distance table, and energy value for vocab Y.

Return recognized phrase for vocab Y. This command can be issued several times to yield first, second, third best, etc.

Return recognized phrase and distance for the current vocabulary.

Return recognized phrase and distance table for vocab Y.

Return recognized phrase and energy value for vocab Y.

Action Return Value

F63Ah

F6h Utt Dst1H Dst1L... DstNH DstNL

F6h Utt EminH EminL EmaxH EmaxL

F6h Utt Dst1H Dst1L... DstNH DstNL EminH EminL EmaxH EmaxL

F73Fh

F7h Utt DstH DstL

F7h Utt Dst1H Dst1L... DstNH DstNL

F7h Utt EminH EminL EmaxH EmaxL

MSM6679A-110 was not in Listen mode.None

Aborting SD Listen mode.F700h Aborting SI Listen mode.F600h Trigger detection code

(see Initialization command). Rejection.F63Bh~F63Fh Invalid signal processing table.F802h Sample data overrun.F840h

Utterance ID in vocabulary Y.F6h Utt

Utterance ID in vocabulary Y, high and low byte of distance to utterance 1... distance to utterance N.

Utterance ID in vocabulary Y, high and low byte of minimum and maximum energy val-ue.

Utterance ID, high and low byte of distance to utterance 1...distance to utterance N, high and low byte of minimum and maximum en-ergy value.

Triggered.F740 Abort SD Listen mode.F700 Rejection.F73E Memory empty.F73F Invalid SP table.F802 Sample data overrun.F840

Abnormal response: Memory empty.

Utt= Utterance ID.F7h Utt

Utt = index of recognized phrase, DstH DstL = high/low bytes of distance from nearest phrase.

Utterance ID, high and low byte of distance to utt. 1...N.

Utterance ID, high and low byte of minimum and maximum energy value.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Recognize (Continued)

Opcode

F341h, F344h, F351h, F361h, F371h

F342h Update complete.F740h

F343h

F371h

Update SD Recognition Enrollment. This command updates enrollment on utter-ance Utt, immediately after a "F7h Utt" response to the Sort SD Distances command (F341h). Alternatively, the utterance to be updated can be selected by the SD Search command (F9XYh). This command uses the recognition parameter vector from the most recently captured utterance, and does not start SD Listen mode. Generally, update should be performed only if correct utterance identify is confirmed by the user.

Recognition Vector Upload. Request recognition parameter vector upload to host.

Return recognized phrase, distance table, and energy value for vocab Y.

Action Return Value

F7h Utt Dst1H Dst1L... DstNH DstNL EminH EminL EmaxH EmaxL

F743h NH NL V1H V1L... VNH VNL = Success, where NH/NL = high/low bytes of N, N = Length of recognition parameter vector V, V1H/V1L = high/low bytes of first element of V, VNH/VNL = high/low bytes of Nth element.

Utterance ID, high and low byte of distance to utterance 1...distance to utterance N, high and low byte of minimum and maximum energy value.

Failure.F743h 00 00

Speak

Opcode

F401h ~ F43Dh

F441h ~ F450h

Action Return Value

Speak Phrase from External Memory. This command causes the MSM6679A-110 to play back a name tag from external memory. If no sound is defined for a selected index, the MSM6679A-110 plays a beep. See the Record commands for information on creating name tags.

Speak Phrase from Low Internal Memory. If no sound is defined for a selected index, the MSM6679A-110 plays a beep. The default phrases supplied with the MSM6679A-110 in the smaller low playback memory area are listed below.

F441h F442h F443h F444h

Drip. Buzzer. Dial tone. Bonk.

F400h

If enabled, this value is returned upon completion of playback.

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Speak (Continued)

Opcode

Speak Phrase from High Internal/External Memory. If no sound is defined for a selected index, the MSM6679A-110 plays a beep. The default phras-es supplied with the MSM6679A110 in the larger upper playback memory area are listed below.

F451h F452h

F451h ~ F47Ch

F47D ——

F47Eh

F47Fh

F480h None.

F481h F4FFh

F50Bh None.

F453h F454h F455h F456h F457h F458h F459h F45Ah F45Bh F45Ch Reserved. This command is reserved for future

use. Beep. This causes the MSM6679A-110 to beep

for 50 ms. Pause. This command can be issued while the

MSM6679A-110 is performing sound output and is then put in the MSM6679A-110 command stack for subsequent processing. When this command is executed, sound output pauses for 0.2 sec. The pause command is useful for word spacing.

Set MSM6654 Mode. This command causes the MSM6679A-110 to initialize the external MSM665x device, also clearing the device from BUSY mode.

Playback Sound from MSM665x Device. This command causes the MSM6679A-110 to issue a speak command to the MSM665x slave device. The value is passed on the MSM665x device as 01h - 07Fh. The actual phrase is determined by the vocabulary programmed into the MSM665x device. Up to 127 external phrases are supported.

Set MSM665x Busy Mode ON.

"0" simulated DTMF tone. "1" simulated DTMF tone. "2" simulated DTMF tone. "3" simulated DTMF tone. "4" simulated DTMF tone. "5" simulated DTMF tone. "6" simulated DTMF tone. "7" simulated DTMF tone. "8" simulated DTMF tone. "9" simulated DTMF tone. "*" simulated DTMF tone. "#" simulated DTMF tone.

Action Return Value

F400h

If enabled, this value is returned upon completion of playback.

If enabled, this value is returned upon completion of playback. If NAR is set, the F400h command is sent when the MSM665x device is ready for an-other command. If busy mode is selected, the F400 command is returened when the sound is finished.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Speak (Continued)

Opcode

Set 6654 NAR mode. This command, which is the complement of the F50B command, sets up

F51Bh None.

FEXYh None.

the handshaking to the attached 6654 speech synthe-sizer to use the NAR. This setup uses the 6654's double buffer feature to eliminate any gap between two consecutive phases.

Set Output Level. This command sets the speech output level to one of 255 values as follows:

FE03 FE80h FEFEh

Set minimum output level. Set output level half way (default). Set maximum output level.

Action Return Value

Request

Opcode

Status Request. This command causes the

F500h

F501h

F510h No return value

F520h No return value

F522h Copy is complete.F501h

F513h Save is complete.F501h

MSM6679A-110 to return a 2-byte value indicating its current status.

Select last FLASH bank for SI recognition. Select download RAM bank for SI/SP template

area. This command enables the download RAM bank in the upper 32 K of data memory for SI recognition.

Select buffer RAM bank for SI/SP. This command enables the buffer RAM bank in the upper 32 K of data memory for SI recognition.

Copy download RAM bank to buffer RAM bank. This command copies the download RAM bank to the buffer RAM bank. The copied address range is (8000-FFFF).

Save download RAM bank templates in first FLASH. Save the download RAM SI/SP area (8000-F2FF) to the same address range in the first FLASH.

Action Return Value

MSM6679A-110 ready.F500h MSM6679A-110 disabled.F520h MSM6679A-110 waiting for start.F540h MSM6679A-110 waiting for end.F560h MSM6679A-110 processing.F580h Download/upload in progress.F5A0h Download/upload complete.F5C0h Select/jump complete.F5E0h

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Request (Continued)

Opcode

Action Return Value

Get download RAM bank templates from the

F514h Save is complete.F501h

first FLASH. Recall the download RAM SI/SP template (8000 - FFFF) from the same address range in the first FLASH.

Save download RAM bank templates in last

F515h Save is complete.F501h

FLASH. SAVE the download RAM bank SI/SP template area (8000 - F2FF) to the same address range in the last FLASH.

Get download RAM bank templates from last

F516h Save is complete.F501h

FLASH. Recall the download RAM bank SI/SP template area (8000 - FFFF) to the same address range in the last FLASH.

Download/Upload.

Full syntax: F5 02 00 Ctl AdH AdL NH NL [Dt1... DtN [Dt(N+1)]] Full syntax: F5 02 00 Ctl AdH AdL NH NL [Dt1... DtN [Dt(N+1)]] Ctl(7) = 0 for download, Ctl(7) = 1 for upload Ctl(6) = 0 for data RAM, Ctl(6) = 1 for program RAM/ROM If Ctl(6)=0 then Ctl(1-0) = Seg: Data segment selection If Ctl(6)=1 and Ctl(1-0) = x0, then external program segment 0 is used. If Ctl(6)=1 and Ctl(1-0) = x1, then external program segment 1 is used.

Immediately after receiving parameter NL, the MSM6679A-110 responds with a message to indicate acceptance or denial of the transfer request. Acceptance is indicated by F5A0h. Denial is indicated by a F8XYh.

At the end of an accepted transfer, the MSM6679A-110 re-sponds with a message to confirm or deny valid completion of the transfer. Valid completion is indicated

by F5C0h. AdH AdL = high, low bytes of starting address. NH NL = high, low bytes of N N = Number of bytes to be downloaded or uploaded (maximum 07FFCh) Dt1... DtN = Download data. Note (here and in upload response) that data are 8-bit binary values, even if using the serial interface. Dt(N+1). If N is odd, an extra byte is appended to the data so that the total number of bytes in

F502h

the message remains even. This command requests data transfer to/from data or external program memory.The control parameter (Ctl) controls the direction of the transfer (i.e., download vs. upload) and specifies which of six 64-Kbyte memory segments (i.e., four data segments and two external program segments) is to be accessed. This command does not work with internal program memory. It is not possible to download to external program memory while running in external program memory. The address and length parameters (AdH AdL NH NL) specify the starting address and length of the transfer in bytes. Since the MSM6679A-110 can only perform download /upload transfers within one 32-Kbyte block in one Download /Upload command, the address and length parameters must not specify a transfer that violates a 32-Kbyte address boundary. If this restriction is violated, the download/upload request will be denied.

FAXYh

FBXYh

Invalid message received.F880h Sample data over-run.F840h 32-Kbyte block boundary violation error.F820h Unclassified download/upload error.F810h Divide-by-zero error.F808h Select/jump error.F804h Invalid SP header or table.F802h Reserved.F801h

Most and least significant byte of ad-dress where error occurred.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Request (Continued)

Opcode

Select/Jump. This command selects a new data segment, or Jumps to a new program segment. Ctl(7)=0 is used to first select a new data segment. Ctl(7)=1 then jumps to that program segment.

Seg(7)=0

Ctl(7)=0

F503h Ctl Seg

Ctl(7)=1

F504h Four-digit ASCII number.XXXX

Retrieve MSM6679A-110 Firmware Revision Number.

Seg(7)=1

Seg(6~2) Seg(1~0)

Seg(7)=0

Seg(7)=1

Seg(6~1)

Seg(0) Failure, with XY(2) = 1.F8XYh

Action Return Value

Upper 32-Kbyte of selected segment is accessed nor-mally.

Access lower 32-Kbyte block of selected segment in up-per 32 Kbytes of data space.

Reserved. Data segment selection. Jump to selected external

program segment. Jump to internal program

segment. Reserved. If Seg(7) =1, not used.

If Seg(7) = 0 and Seg(0) = 0: external program segment 0. If Seg(7) = 0 and Seg(0) = 1: external program segment 1.

Success.F5E0h

Failure, with XY(2) = 1.F8XYh

Success.F5E0h

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Request (Continued)

Opcode

Initialize in Background. Background noise initialization is performed for 500 ms. The MSM6679A-110 requires this command prior to recognition for noise vector subtraction during the utterance sampling period. Use the background initialization command whenever there is a change in the background noise level. For example, sample the noise signature in a vehicle at rest and moving at 35 MPH with its windows rolled down. The quality of a phone line connection can also vary from call to call. The host MCU must implement a strategy as to

F505h Initialization is complete.F501h

F506h Four digit ASCII number.XXXX

F507h Save is complete.F501h

F508h No return value

F509h ——

when to issue a background initialization command. In a vehicle, the host MCU could monitor the vehicle speed, fan speed, radio volume, etc. Alternatively, the host MCU could issue this command each time a new recognition session starts or a new line connection is established. However, the 0.5-sec sample period could degrade system responsiveness if used too frequently. A zero in this bit location during the F2XXh command will not cause an initialization. The F2xxh command can also be used to perform background noise initialization.

Retrieve Vocabulary and Trigger Table Revision Number.

Save SDR templates in last FLASH. Save the download RAM bank SD template area. Saves 2684 bytes from the address set by the F103 command to the address range F300FD7F in the last FLASH. The default is 4A00547B→F300-FD7F).

Get SDR templates from last FLASH. Get the download RAM bank SD template area. Saves 2684 bytes to the address set by the F103 command from the address range F300FD7B in the last FLASH. The default is (F300FD7B→4A00-547B).

Select Default SI Vocabulary. (First FLASH)

Action Return Value

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Record

Opcode

Set Name Tag Length, Set MSM665x Busy Mode ON. Name tag record length is set by

F101h 00XXh

F105 xxxx

F106 xxxx

F50Ah Name tag table cleared.F501h

F50Ch Saved name tag table recalled.F501h

F51Ch Name tag pointers recalled.F501h

F50Dh Name tag table saved.F501h

F51Dh Name tag pointers saved.F501h

F50Eh ——

F50Fh ——

FA00h ——

FA01h ~ FA3Dh

XXh, with XXh defining record length in 14-ms intervals. The maximum record length of FFh yields a recording interval of 3.57 sec. The default value is 1.2 sec.

Set Name Tag Record Origin. This command sets the beginning address for recording name tags. XXXX = 128 byte blocks from 0000 to 02FF. The reset default is 0000. This is only effective before an F50A command since new recordings start after the end of the previous recording. The F50A command uses this num-ber to calculate the first address.

Set Name Tag Record End. This command sets the ending address for recording name tags. XXXX = 128 byte blocks from 0000 to 02FF. The reset default is 01FF.

Clear Name Tag Table. Recall name tag pointers from first FLASH.

Save the first FLASH name tag pointers (FD80 FFFF) to the working name tag pointer table. The default is (FD80-FFFF→5480-56FF).

Recall name tag pointers from last FLASH. Save the last FLASH name tag pointesr (FD80 FFFF) to the working name tag pointer table. The default is (FD80-FFFF→5480-56FF).

Save name tag pointers in first FLASH. Save the working name tag pointer table to the first FLASH name tag pointers. The default is (5480

-56FD→FD80-FFFD). Save name tag pointers in last FLASH. Save the

working name tag pointer table to the last FLASH name tag pointers. The default is (5480

-56FD→FD80-FFFD). Set Record Volume HIGH. Set Record Volume to Normal. This is the

default setting. Reserved. This command is reserved for future

use.

Record Name Tag.

Action Return Value

F105 BAAA, where B is the bank num-ber (0,1,2), and AAA is the bank ad-dress /16 (800 - FF8)

F106 BAAA, where B is the bank num-ber (0,1,2), and AAA is the bank ad-dress /16 (800 - FF8)

Operation complete.F101h 00XXh

Completed.FA00h Memory full.F280h

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Record (Continued)

Opcode

FA3Dh ~ FAFFh

Reserved. These commands are reserved for future use.

Action Return Value

——

SD Recognition Control

Opcode

Recognition performance is largely a function of how well the enrollment data represents subsequent tokens of the enrolled utterances, and performance generally improves steadily with each additional enrollment pass. For most applications, three initial enrollment passes are recommended. Subsequent reference updating can be performed with the SD Recognize Update command (F342).

Clear SDR table. This command initializes a blank SD template table. The 2684-byte area

F521h SDR table is clearedF501h

F6XYh No return value.

F9XYh Utterance number not found.F700h

from the address set by the F103 command (the working SDR table) is set to zeros. The SDR tables in the FLASH banks are not affected. The default is (4A00 - 547B).

Set SD Segment Pointer. This command sets the SD segment pointer to XY00h, i.e., set the starting address of the current SD recognition parame-ter table to XY00h. Issuing this command is equivalent to issuing the Set SD Origin command, F103h XY00h. (For further details of operation, please refer to the description of that command.)

Search for SD Utterance XY. This is the first step in adding an utterance to the vocabulary, or in replacing an existing one. The SD vocabulary memory is searched for utt. no. XYh. If it is not found and if sufficient SD memory exists, the MSM6679A prepares to add utterance number XYh to the vo-cabulary.

Action Return Value

Utterance number found.F740h

Memory full.F73Fh

Enroll SD Utterance. This command starts MSM6679A SD Listen mode, then uses the next captured utterance to start or update training of the reference data for SD utterance number XY specified in the most recent Search command (F9XYh). The user must be

FB00h

FC00h Operation complete.F740h

prompted to say the utter-ance prior to issuing this command. If the utterance was previously enrolled, a training update is performed; if not, the reference data is initialized. Each utterance in the SD vocabulary must be enrolled at least once before it can be recognized.

Erase utterance from SD vocabulary. This command erases the reference parameters for utterance number XYh from the SD vocabulary, where XYh is the utterance number retained from the previous Search command (F9XYh).

Operation complete.F740h

Aborting SD Listen mode.F700h

Improper level, must repeat.F73Eh

Invalid signal processing table.F802h

Sample data overrun.F840h

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Asynchronous Serial Protocol Example

All messages to the MSM6679A (except downloads and uploads) are echoed, but replies from the MSM6679A to the host are not echoed by the host. This arrangement facilitates manual communication with the MSM6679A using standard terminals. The following table illustrates the range of MSM6679A functions.

Comment Action

Initialize MSM6679A Host initializes MSM6679A.

MSM6679A acknowledges.

Install new software ersion.

Upload software for verification of transfer.

Run new software. Host commands jump

Load trigger tables at 5000h.

Set new triggering origin. Host requests

Download new SD vocabulary.

Host requests download to program segment 40, starting at location 0, of 32 Kbytes (7FFCh). MSM6679A accepts request. Host sends 32 Kbytes. (~34 sec at 9600 baud). MSM6679A indicates downloadcomplete.

Host requests upload from program segment 0, starting at location 0, of 32 Kbytes (7FFCh). MSM6679A accepts request. MSM6679A sends 32 Kbytes. MSM6679A indicates upload complete.

to external program segment 0. MSM6679A begins running new load.

Host requests download to data segment 0, starting at location 5000h, of 256 bytes (0100h). MSM6679A accepts request. Host sends 256 bytes (~0.25 sec at 9600 baud). MSM6679A indicates download complete.

Set triggering origin to 5000h. MSM6679A sets triggering origin and sends confirming response.

Host requests download to data segment 0, starting at location 6000h, of 4 Kbytes (1000h). MSM6679A accepts request. Host sends 4 Kbytes (~4.3 sec at 9600 baud) MSM6679A indicates download complete.

Voice Input

Host

Command

F258

F502 0040 0000 7FFC F5A0 ...

F502 00C0 0000 7FFC

F503 8000

F502 0000 5000 0100

...

F104 5000

F502 0000 6000 1000

...

MSM6679A

Response

F258 F200

502 0040 0000 7FFC

F5C0 F502

00C0 0000 7FFC F5A0 ... F5C0

F503 8000 F5E0

F502 0000 5000 0100 F5A0

F5C0 F104

5000 F104 5000

F502 0000 6000 1000 F5A0

F5C0

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Comment Action

Set new SD tables. Host requests

Set SD origin to 6000h. MSM6679A sets SD origin and responds.

Download first 4 K of SI vocabulary.

Download last 32 K of SI vocabulary.

Set new SP/SI tables. Host requests

Upload data for diagnostics.

Set up MSM6679A for SI recognition.

SI recognition. Host starts SI recognition, vocabulary 1.

Host requests download to data segment 0, starting at location 7000h, of 4k bytes (1000h). MSM6679A accepts request. Host sends 4 Kbytes. MSM6679A indicates download complete.

Host requests download to data segment 0, starting at location 8000h, of 32k bytes (7FFC). MSM6679A accepts request HOST sends 32 Kbytes. MSM6679A indicates download complete.

Set SP/SI origin = 7000h. MSM6679A sets SP/SI origin and responds.

Host requests upload from data segment 0, starting at location 300h, of 45 bytes (2Dh). MSM6679A accepts request, signals in progress. MSM6679A sends 46 bytes. MSM6679A indicates upload complete.

Host requests set SP table 3. MSM6679A selects SP table 3 and confirms. Host initializes MSM6679A. MSM6679A acknowledges.

MSM6679A recognizes utterance 3. Host starts SI recognition, vocabulary 2.

MSM6679A recognizes utterance 2. Host starts SI recognition, vocabulary 2.

MSM6679A recognizes utterance 3.

Voice Input

"Dial"

"Two"

"Three"

Host

Command

F103 6000

F502 0000 7000 1000

...

F502 0000 8000 7FFC

...

F102 7000

F502 00A0 0300 002D

F123

F258

F301

F302

MSM6679A

Response

F103 6000 F103 6000

F502 0000 7000 1000 F5A0

F5C0 F502

0000 8000 7FFC F5A0

F5C0 F102

7000 F102 7000

F502 00A0 0300 002D F5A0

... F5C0

F123 F123

F258 F200

F301

F603 F302

F602 F302

F603

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Comment Action

SD enrollment. Host starts SI recognition, vocabulary 1.

MSM6679A recognizes utterance 7. Get ready to train SD utterance 1. Memory is empty and ready to train. Pass 1; host sends SD enroll command.

SD utterance 1 initialized. Pass 2; host sends SD enroll command.

SD utterance 1 updated. Pass 3. Host sends SD enroll command.

SD utterance 1 updated.

SI recognition of control words.

SD enrollment. Host prepares MSM6679A to train SD

SI recognition of control word.

SD recognition. Host starts SD recognition.

Host starts SI recognition, vocabulary 1.

MSM6679A recognizes utterance 3. Host starts SI recognition, vocabulary 2.

MSM6679A recognizes utterance 5. Host starts SI recognition, vocabulary 2.

MSM6679A recognizes utterance 6. Host starts SI recognition, vocabulary 1.

MSM6679A recognizes utterance 7.

utterance 2 Memory is empty and ready to train. Pass 1; host sends SD enroll command.

SD utterance 2 initialized. Pass 2; host sends SD enroll command.

MSM6679A updates SD utterance 2. Pass 3; host sends SD enroll command.

MSM6679A signals operation completed. Host starts SI recognition, vocabulary 1.

MSM6679A recognizes utterance 11.

MSM6679A signals trigger OK. Host sends SD sort command. MSM6679A recognizes utterance 1.

Voice Input

"Store"

"John Smith"

"Dial"

"Five"

"Six"

"Store"

"Bill Jones"

"Call"

"John Smith"

Host

Command

F301

F901

FB00

F301

F302

F301

F902

FB00

F301

F340

F341

MSM6679A

Response

F301

F607 F901 F700 FB00

F740 FB00 F740 FB00

F740

F301

F603 F302

F605 F302

F606 F301

F607 F902

F700 FB00

F740 FB00

F740 F301

F60B F340

F740 F341 F701

¡ Semiconductor MSM6679A-110 Voice Recognition Processor

Comment Action

Name tag recording. Host initiates MSM665x port.

Host sets recording length to 1 sec. MSM6679A signals operation complete. Host clears name tag table MSM6679A signals operation complete. Host sets record gain to max. level. Start recording tag one.

MSM6679A signals name tag recording complete. Save name tags to FLASH. Name tags saved.

Name tag playback. Host sets volume to max. level.

Host commands play back name tag 1.

MSM6679A signals playback OK.

Sound playback. Host sets output volume to mid point.

Play MSM6679A internal sound 1.

Play back sound from MSM6654.

Voice Input

"Jane Doe"

Host

Command

F480 F101 0047

F50A

F50E FA01

F50D

FEFF F401

FE80 F442

F49F

MSM6679A

Response

F480 F101 0047 F101 0047 F50A F501 F50E FA01

FA00

F50D F501

FEFF F401 "Jane Doe" F400

FE80 F442 "bzzzz" F49F "Completed"

The information contained herein can change without notice owing to product and/or technical improvements. Please make sure before using the product that the information you are referring to is up-to-date. The outline of action and examples of application circuits described herein have been chosen as an explanation of the standard action and performance of the product. When you actually plan to use the product, please ensure that the outside conditions are reflected in the actual circuit and assembly designs. OKI assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters outside the specified maximum ratings or operation outside the specified operating range. Neither indemnity against nor license of a third party’s industrial and intellectual property right,etc.is granted by us in connection with the use of product and/or the information and drawings contained herein. No responsibility is assumed by us for any infringement of a third party’s right which may result from the use thereof. When designing your product, please use our product below the specified maximum ratings and within the specified operating ranges, including but not limited to operating voltage, power dissipation, and operating temperature. The products listed in this document are intended for use in general electronics equipment for commercial applications (e.g.,office automation, communication equipment, measurement equipment, consumer electronics, etc.).These products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property or death or injury to humans. Such applications include, but are not limited to: traffic control, automotive, safety, aerospace, nuclear power control, and medical, including life support and maintenance.

MSM6679A-110 Voice Recognition Processor ¡ Semiconductor

Certain parts in this document may need governmental approval before they can be exported to certain countries. The purchaser assumes the responsibility of determining the legality of export of these parts and will take appropriate and necessary steps, at their own expense, for export to another country. Copyright 1997 OKI SEMICONDUCTOR OKI Semiconductor reserves the right to make changes in specifications at anytime and without notice. This information furnished by OKI Semiconductor in this publication is believed to be accurate and reliable. However, no responsibility is assumed by OKI Semiconductor for its use; nor for any infringements of patents or other rights of third parties resulting from its use. No license is granted under any patents or patent rights of OKI.

OKI MSM6679A-110 V Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual