SC-691

Speech And Music Processor

Data sheet

P/N 80-0211-C

Features

Advanced, Catalog Speech Processor for High-
Quality Sound, Capable of Unlimited Speech
Duration Using External Memory

Operates up to 12.32 MIPS.

Supports High-Quality Algorithms Such as MX
(1.0 Kbps 3.5 Kbps at 8 kHz), CX (3.0 Kbps
11.2 kHz at 8 kHz Sampling Rate), ADPCM,
Single Channel FM with CX or MX.

Speed and Pitch Shifting in MX for Various
Voice Effects.

Six Level Digital Gain Control.

4 User Configurable I/O's.

Very Low-Power Operation, Ideal for Hand-Held
Devices.

Low-Voltage Operation, Sustainable by Three
(3) Batteries.

Three Reduced Power Standby Modes, Less
Than 10 µA in Deep-Sleep Mode.

Resistor-Trimmed Oscillator or 32.768 kHz
Crystal Reference Oscillator.

Direct Speaker Drive, 32 (PDM).

Interrupt Driven, 4 or 8-Bit Parallel Data
Transfer Protocol.

Available in Die Form or 64-Pin LQFP Package

Description

The SC-691 is a standard slave synthesizer
from Sensory, Inc. that accepts compressed
speech data from other microprocessors or
microcontrollers and converts it to speech.
This allows the SC-691 to be used with a master
microprocessor/microcontroller in various
speech-related products such as security
systems, learning aids, games, and toys. High
quality, low bit-rate coders, easy interface with
the master microcontroller, digital gain control,
low power sleep mode, and low voltage
operation makes this device ideal for products
requiring long duration speech, less
development cycle times, and peripheral device
control through the slave device.

This device supports several speech synthesis algorithms that permit tradeoffs to meet the price performance
requirements of various markets.
The SC-691 implements a unique feature of playing a single channel FM music along with CX or MX speech
data concurrently. This feature allows the user to speak a certain phrase in MX or CX with single channel music
in the background.

The SC-691 is optimized to support a 4-bit wide data transfer protocol. The device has two status bits and three
control bits that control the communication protocol between the master and the slave.
The SC-691 also has 1 bit (command/data) which differentiates between a command and speech data feeding
into the slave. In 4-bit mode, various commands are sent to the slave during speech to perform various tasks.

The SC-691 also supports the 8-bit wide data transfer but the support for commands is disabled during
speaking-a-phrase. When speaking-a-phrase in 8-bit mode is complete, the SC-691 switches back to the 4-bit
mode to receive the next command. Switching between 4 bit mode and 8 bit mode is permitted between speech
data files.

SC-691 Block Diagram

16-Bit

Microprocessor

640-words

RAM

TIMER 1
TIMER 2

PLLM

10-Bit

DAC

SLAVE LOGIC

COMPARATOR

Data Sheet

SC-691

P/N 80-0211-C

Pin/Pad Assignments

SC-691

(top view of the die)

SC-691

(64-lead LQFP)

VSS
DACP

PD5
PD6
PD7
DATA0
DATA1

48
47

42
41
40
39
38

DATA2
DATA3
DATA4

37
36
35

VDD

DACM
VDD
PD4

45
44
43

DATA5

DATA6

VSS

VDD
VDD

R/W_

STROBE_

OUTRDY_

INRDY_

TEST

SCANOUT

SYNC

SCANCLK

SCANIN

RESET_

1
2
3
4
5
6
7
8
9
10
11
12

PLL

OSCIN

OSCOUT

VSS

13
14
15
16

NAME

PIN NO. PAD NO. I/O DESCRIPTION

DATA0DATA3

36 25

22 I/O Data bits 0 through 3 (in 4-bit or 8-bit mode)

DATA4 or
DATA/COMMAND

35 21

I/O

Data bit 4 (in 8-bit mode)
NOTE: Pin 8 is DATA4 in 8-bit mode, or DATA/COMMAND in 4-bit mode.

DATA5DATA7

32 20

18 I/O Data bits 5 through 7 (8-bit mode only)

INRDY_ 6

An output signal from the slave to the microcontroller. A low signal indicates that
the SC-691 is ready to accept data or command. A high signal indicates that the
SC-691 is busy and the microcontroller must not write any data or command to it

OUTRDY_ 5

An output signal from the slave to the microcontroller. A low signal indicates that
the SC-691 is ready to send data or command to the microcontroller.

PD4PD7

40 29

26 I/O General-purpose I/O bus

R/W_ 3

An input signal to the slave from the microcontroller. Read/write select signal which
is set high for read operations or set low for write operations by the microcontroller.

STROBE_ 4

An input signal to the slave from the microcontroller. STROBE_ sequences read or
write operations in conjunction with the R/W_ signal. This signal is pulsed high-low-
high for read or write operations sequencing.

Reference Oscillator Signals
OSCOUT

O Output of resistor/crystal oscillator

OSCIN

I Input to resistor/crystal oscillator

PLL

O Output of phase-lock-loop filter

Scan Port Control Signals
SCANIN

I Scan port data input

SCANOUT

O Scan port data output

SCANCLK

I Scan port clock

SYNC

I Scan port synchronization

TEST

Test

modes

Digital-to-Analog Sound Output
DACP

O Digital-to-analog plus output (+)

DACM

O Digital-to-analog minus output()

Initialization
RESET_ 12

Device

initialization

Power Signals

1, 2, 31,

44, 46

1, 2, 17,

30, 32

- Processor power, 5 V nominal supply voltage

16, 48,

, 64

16, 34

35, 36

- Ground

All pins must be N.C.
Marked pins are

and

connections which service the DAC circuitry. These pins tend to sustain a higher current draw. A dedicated

decoupling capacitor across these pins is therefore required.

SC-691

Data sheet

P/N 80-0211-C

SC-691 (4-bit mode)

SC-691 (8-bit mode)

Number of data lines

Number of control lines

3 (STROBE_, R/W_, data/command)

2 (STROBE_, R/W_)

Number of status lines

2 (INRDY_, OUTRDY_)

Number of general-purpose I/O lines

Support for commands (while speaking)

Yes

Figure 1: Interfacing Diagram 4-Bit Mode

Note:

STROBE_

Active low STROBE_ signal from microcontroller

R/W_

Read/write signal from microcontroller

RESET_

Active low RESET_ signal from microcontroller

DATA0

DATA3 Data bits 0 through 3

PD4PD7

General-purpose I/O bus

DACP

Output to speaker/amplifier

DACM

Output to speaker/amplifier

DATA/COMMAND

This bit determines if the data sent by the microcontroller is data or command.

Figure 2: Interfacing Diagram 8-Bit Mode

Note:

STROBE_

Active low STROBE_ signal from microcontroller

R/W_

Read/write signal from microcontroller

RESET_

Active low RESET_ signal from microcontroller.

INRDY_

Active low indicates that the SC-691 is ready to accept data.

OUTRDY_

Active low indicates that the SC-691 is ready to send data.

SC-691

Data sheet

P/N 80-0211-C

Read Operation By The Master

The process for the read operation by the master is the same in either 4-bit or 8-bit mode. The read operation by
the master happens when the slave wants to send something to the master. The read process is initiated by the
slave by pulling OUTRDY_ low when it is ready.

The following events take place during the read operation:

The SC-691 puts the data to be sent to the master on the internal bus.

The SC-691 sets OUTRDY_ low to indicate that it is ready to send data to the microcontroller.

The microcontroller sets R/W_ high to indicate a read operation.

The microcontroller sets STROBE_ low. The data is available on the external data-bus at this point.

The microcontroller reads the data from the bus.

The microcontroller sets STROBE_ high. The SC-691 also pulls OUTRDY_ high at the rising edge of
STROBE_.

The data is taken from the external data-bus after STROBE_ goes high.

The microcontroller should latch or read in the data while STROBE is low. When the microcontroller sets
STROBE_ high, the SC-691 sets OUTRDY_ high to indicate that the data has been successfully transferred.

A) Sequence of events for a single read operation:

OUTRDY

STROBE

DATA

COMMAND/DATA

R/W

B) Read-Two speech data transfer sequences:

OUTRDY

STROBE

DATA

COMMAND/DATA

R/W

Figure 3: Data Transfer Read

Write Operation By The Master

The process for the write operation by the master is the same in either 4-bit or 8-bit mode. The write operation
by the master happens when the slave is ready to request data or command from the master. The write process
is initiated by the slave by pulling INRDY_ low when the slave is ready to receive data. The following events
take place during the write operation:

The SC-691 sets INRDY_ low to indicate that it is ready to receive data from the microcontroller.

The microcontroller sets R/W _low to indicate a write operation.

The microcontroller puts the data in the external data-bus.

The microcontroller sets STROBE_ low after the data is valid.

The microcontroller sets STROBE_ high after a minimum of 300 ns. The SC-691 also pulls INRDY_ high at
the rising edge of STROBE_.

The data is latched in the SC-691 at the rising edge of STROBE_.

SC-691

Data sheet

P/N 80-0211-C

Absolute Maximum Ratings

Absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, V

(see Note 1)

-0.3 to 7 V

Supply current, I

(see Note 2)

35 mA

Input voltage range, V

(see Note 1)

-0.3 to V

+ 0.3 V

Output voltage range, V

(see Note 1)

-0.3 to V

+ 0.3 V

Storage temperature range, T

-30

°C to 125°C

WARNING:

Stressing the SC-691 beyond the "Absolute
Maximum Ratings" may cause permanent
damage. These are stress ratings only.
Operation beyond the "Operating Conditions" is
not recommended and extended exposure
beyond the "Operating Conditions" may affect
device reliability.

NOTES: 1. Unless otherwise noted, all voltages are measured with respect to V

2. The total supply current includes the current out of all the I/O pins as well as the operating current of the device.

Recommended Operating Conditions

MIN

MAX

UNIT

Supply voltage (with respect to V

), V

5.2

CPU clock rate (as programmed), f

(CPU)

12,320

kHz

Load resistance between DAC

and DAC

(DAC)

Operating free-air temperature, T

Device

functionality

°C

Timing Requirements

MIN

MAX

UNIT

(RESET)

Reset_ low pulse width, while V

is within specified limits

100

(WIDTH)

Pulse width required prior to a negative transition at pin (PD3 or PD5 interrupt)

1/F

CPU

(WIDTH)

Pulse width required prior to a positive transition at pin (PD2 or PD4 interrupt)

1/F

CPU

(RESET)

Figure 5: Initialization Timing Diagram

(WIDTH)

(WIDTH (PD3, PD5, or F port))

(WIDTH (PD2, or PD4))

Figure 6: SC-691 External Interrupt Pin Pulse Width Requirements t1

WIDTH

and t2

WIDTH

Data Sheet

SC-691

P/N 80-0211-C

DC Electrical Characteristics, TA = 0 to 70

°C

PARAMETER

TEST CONDITIONS

MIN TYP

MAX UNIT

Positive going threshold

2.4

Negative going threshold

1.8

= 3 V

Hysteresis

0.6

Positive going threshold

3.3

Negative going threshold

2.9

RESET_ Threshold

changes

= 5.2 V

Hysteresis

0.4

= 3 V

= 4.5 V

4.5

High-level input voltage

= 5.2 V

3.5

5.2

= 3 V

= 4.5 V

1.5

Low-level

input

voltage

= 5.2 V

1.7

High-level output current per pin of I/O port

= 4 V

Low-level output current per pin of I/O port

= 0.5 V

OH (DAC)

High-level output DAC current

= 4 V

OL (DAC)

Low-level output DAC current

= 4.5 V

= 0.5 V

lkg

Input leakage current

Excludes OSC

µA

(STANDBY)

Standby current

RESET is low

0.05

µA

Operating current

= 4.5 V, F

CLOCK

= 12.32 MHz

(SLEEP-deep)

= 4.5 V, DAC off, ARM set, OSC disabled

0.05

(SLEEP-mid)

= 4.5 V, DAC off, ARM set, OSC enabled

(SLEEP-light)

Supply current

= 4.5 V, DAC off, ARM clear, OSC enabled

100

µA

Input offset voltage

= 4.5 V, V

ref

= 1 to 4.25 V

(PULLUP)

F port pullup resistance

= 5 V

150

(RTO-trim)

Trim

deviation

RTO

= 470 K

, V

= 4.5 V, T

= 25°C,

RTO

= 8.192 MHz (PLL setting = 7 Ch)

±1% ±3%

(RTO-volt)

Voltage

deviation

RTO

= 470 K

, V

= 3.5 to 5.2 V, T

= 25°C,

RTO

= 8.192 MHz (PLL setting = 7 Ch)

±1.5%

(RTO-temp)

Temperature deviation

RTO

= 470 K

, V

= 4.5 V, T

= 0 to 70°C,

RTO

= 8.192 MHz (PLL setting = 7 Ch)

±0.03 %/°C

(RTO-res)

Resistance

deviation

= 4.5 V, T

= 25°C, R

(OSC)

= 470 K

at ±1%,

RTO

= 8.192 MHz (PLL setting = 7 Ch)

±1%

Operating current assumes all inputs are tied to either V

or V

with no input currents due to programmed pullup resistors. The DAC

output and other outputs are open circuited.
The best trim value is selected at nominal temperature and voltage but the deviation due to the trim error is ignored.
§ Typical voltage and current measurement taken at 25

°C

¶ This parameter cannot exceed 15 mA total per internal V

pin. Port C and port D share 1 internal V

. Ports A and G0 are used internally.

External Component Absolute Values

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

(RTO)

RTO external resistance

= 25°C, 1% tolerance

470

(PLL)

PLL external capacitance

= 25°C, 10% tolerance

3300

Data Sheet

SC-691

P/N 80-0211-C

Die Bond-out Coordinates

Die Size = 147.64 x 111.02 Mil
Pad Size = 210 x 210 Mil
Units = Metric

Pad Pin X-Axis Min Y-Axis Min X-Axis Max Y- Axis Max

1 1

149.00 2122.80

235.00 2208.80

2 2

149.00 1961.45

235.00 2047.45

3 3

127.40 1805.45

213.40 1891.45

4 4

127.40 1651.45

213.40 1737.45

5 5

127.40 1497.45

213.40 1583.45

6 6

127.40 1343.45

213.40 1429.45

7 7

127.30 1191.05

213.30 1277.05

8 8

127.40 1077.95

213.40 1163.95

9 9

127.30 925.45

213.30 1011.45

10 10

127.30

814.15

213.30

900.15

11 11

127.30

702.85

213.30

788.85

12 12

127.45

555.50

213.45

641.50

13 13

127.30

435.50

213.30

521.50

14 14

127.30

324.20

213.30

410.20

15 15

127.30

212.90

213.30

298.90

16 16

148.00

108.10

234.00

194.10

17 31

3385.20

61.50

3471.20

147.50

18 32

3472.20

172.75

3558.20

258.75

19 33

3472.20

326.75

3558.20

412.75

20 34

3472.20

480.75

3558.20

566.75

21 35

3472.20

634.75

3558.20

720.75

22 36

3472.20

788.75

3558.20

874.75

23 37

3472.20

942.75

3558.20

1028.75

24 38

3472.20 1096.75

3558.20

1182.75

25 39

3472.20 1250.75

3558.20

1336.75

26 40

3472.20 1404.75

3558.20

1490.75

27 41

3472.20 1558.75

3558.20

1644.75

28 42

3472.20 1712.75

3558.20

1798.75

29 43

3472.20 1866.75

3558.20

1952.75

30 44

3450.60 2026.15

3536.60

2112.15

31 45

3517.01 2165.85

3603.01

2251.85

32 46

3517.01 2319.91

3603.01

2405.91

33 47

3517.01 2473.95

3603.01

2559.95

34 48

3516.80 2583.45

3602.80

2669.45

35 49

3149.35 2581.75

3235.35

2667.75

36 64

97.30 2533.65

183.30

2619.65

Ordering Information

Part

Ordering P/N Shipping P/N Description

SC-691 DIE

SC691

65-0140-A

Tested, Singulated SC-691 die in waffle pack.

SC-691 LQFP SC691-L1

65-0139-A

SC-691 64 pin 10x10x1.4mm LQFP

1991 Russell Ave., Santa Clara, CA 95054
Tel: (408) 327-9000 Fax: (408) 727-4748

www.sensoryinc.com

The Interactive SpeechTM Product Line

The Interactive Speech line of ICs and software was developed to "bring life to products" through advanced speech recognition and audio
technology.
The Interactive Speech Product Line was designed for consumer telephony products and cost-sensitive consumer electronic applications
such as home electronics, personal security, and personal communication.
The product line includes award-winning RSC series general-purpose microcontrollers and tools, SC series of speech microcontrollers, plus
a line of easy-to-implement chips that can be pin-configured or controlled by an external host microcontroller. Sensory's software
technologies run on a variety of microcontrollers and DSPs.

RSC Microcontrollers and Tools

The RSC product line contains low-cost 8-bit speech-optimized microcontrollers designed for use in consumer
electronics. All members of the RSC family are fully integrated and include A/D, pre-amplifier, D/A, ROM, and RAM
circuitry. The RSC family can perform a full range of speech/audio functions including speech recognition, speaker
verification, speech and music synthesis, and voice record/playback. The family is supported by a complete suite
of evaluation tools and development kits.

SC Microcontrollers and Tools

The SC-6x product line feature the highest quality speech synthesis ICs at the lowest data rate in the industry. The line includes a 12.32
MIPS processor for high-quality low data-rate speech compression and MIDI music synthesis, with plenty of power left over for other
processor and control functions. Members of the SC-6x line can store as much as 37 minutes of speech on chip and include as much as
64 I/O pins for external interfacing. Integrating this broad range of features onto a single chip enables developers to create products with
high quality, long duration speech at very competitive price points.

Application Specific Standard Products (ASSPs)

Voice DirectTM II provides inexpensive speaker-dependent speech recognition and speech synthesis. This easy-to-use, pin-
configurable chip requires no custom programming and can recognize up to 15 words in 4 pin-programmable modes. Ideal for speaker-
dependent command and control of household consumer products, Voice DirectTM II is part of a complete product line that includes the
IC, module, and Voice DirectTM II Speech Recognition Kit.

Voice ExtremeTM simplifies the creation of fully custom speech-enabled products by offering developers the capability of
programming the chip in a high-level C-like language. Program code, speech data, and even record and playback
information can be stored on a single off-chip Flash memory. Based on Sensory's RSC-364 speech processor, Voice
Extreme includes a highly efficient on-chip code interpreter, and is supported by a comprehensive suite of low-cost
development tools.

Software and Technology

Voice ActivationTM micro footprint software provides advanced speech technology on a variety of microcontroller and DSP
platforms. A flexible design with a broad range of technologies allows manufacturers to easily integrate speech functionality
into consumer electronic products.

Fluent SpeechTM small footprint software recognizes up to 50,000 words; offers Animated Speech with the ability to automate
enunciation and articulation; performs text-to-speech synthesis in either male or female voices; provides noise and echo
cancellation, performs Wordspotting for natural language usage; offers telephone barge-in; and provides continuous digit
recognition.

Important notices

Reasonable efforts have been made to verify the accuracy of information contained herein, however no guarantee can be
made of accuracy or applicability. Sensory reserves the right to change any specification or description contained herein.
Sensory reserves the right to make changes to or to discontinue any product or service identified in this publication at any time
without notice in order to improve design and supply the best possible product. Sensory does not assume responsibility for use of any
circuitry other than circuitry entirely embodied in a Sensory product. Information contained herein is provided gratuitously and without
liability to any user. Reasonable efforts have been made to verify the accuracy of this information but no guarantee whatsoever is given
as to the accuracy or as to its applicability to particular uses. Applications described in this data sheet are for illustrative purposes only,
and Sensory makes no warranties or representations that the RSC/SC series of products will be suitable for such applications. In every
instance, it must be the responsibility of the user to determine the suitability of the products for each application. Sensory products are
not authorized for use as critical components in life support devices or systems. Sensory conveys no license or title, either expressed or
implied, under any patent, copyright, or mask work right to the RSC series of products, and Sensory makes balance between
recognition and synthesis no warranties or representations that the RSC series of products are free from patent, copyright, or mask work
right infringement, unless otherwise specified. Nothing contained herein shall be construed as a recommendation to use any product in
violation of existing patents or other rights of third parties. The sale of any Sensory product is subject to all Sensory Terms and
Conditions of Sales and Sales Policies.

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: SC-691

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: SC-691