Datasheet SNC698 Datasheet (SONIX)

SNC698

4-Channel Speech Controller

======== CONTENTS ========

1. INTRODUCTION............................................................................................................... 3

2. FEATURES ....................................................................................................................... 3

3. BLOCK DIAGRAM ...........................................................................................................4

4. PIN ASSIGNMENT ........................................................................................................... 4

5. FUNCTION DESCRIPTIONS............................................................................................ 5

5.1 O

5.2 ROM.............................................................................................................................. 5

5.3 RAM ..............................................................................................................................5

5.4 P

5.5 S

5.6 A

5.7 I/O P

5.8 IR F

5.9 8-

SCILLATOR

OWER DOWN MODE

AMPLING RATE COUNTERS

UTO REPETITION

ORTS

UNCTION

DAC ...................................................................................................................... 7

BIT

................................................................................................................... 5

...................................................................................................... 5

............................................................................................ 5

........................................................................................................... 6

...................................................................................................................... 6

.................................................................................................................. 7

5.10 8-

6. ABSOLUTE MAXIMUM RATING ..................................................................................... 9

7. ELECTRICAL CHARACTERISTICS ................................................................................ 9

8. ROSC PERFORMANCE.................................................................................................10

9. APPLICATION CIRCUIT ................................................................................................11

10.

PWM ..................................................................................................................... 8

BIT

BONDING PAD........................................................................................................... 13

Ver: 1.2 August 26, 2003

1

SNC698

4-Channel Speech Controller

AMENDENT HISTORY

Version Date Description

Ver 1.1 April 24, 2003 First issue

Ver 1.2 August 26, 2003 2. FEATURES : Modify Power supply is 2.4~5.5V

5. FUNCTION Description

5.1 Oscillator : Modify ROSC R=100KΩ

7. Electrical Characteristic : Add Current (ROSC&XTAL

Mode), and Operating Voltage Max = 5.5V

8. ROSC Performance : Add ROSC Performance

9. Application Circuit : Add Note about C1 close to VDD

pin of Chip

Ver: 1.2 August 26, 2003

2

SNC698

4-Channel Speech Controller

1. INTRODUCTION

SNC698 is a 85 seconds single chip 4-channel voice synthesizer IC which contains 24
I/O pins and a tiny controller. By programming through the tiny controller, users’
applications including section combination, trigger modes, output status, high
performance melody, multiple voices, and other logic functions can be implemented.

2. FEATURES

 Single power supply 2.4V – 5.5V
 Built in a tiny controller
 85 seconds voice capacity are provided
 Six 4-bit I/O ports are provided
 256*4 bits RAM are provided
 Maximum 64k program ROM is provided
 256K*12 ROM size is provided for voice data and program
 Readable ROM code data
 Built in a high quality speech synthesizer
 Four independent voice channels
 Adaptive playing speed from 4k-40kHz is provided for all 4 channels individually
 Automatic repetition for every channel
 A 6-bit*8-bit Multiplier is embed to modulate the volume of synthesized voices
 Two digital mixers (with saturation control) are provided
 Built in a PWM Direct Drive circuit and a current output DA converters.
 Built in 15 levels PWM output volume control.
 System clock: 8M Hz ( RC-type or Crystal Option)
 Low Voltage Reset

Ver: 1.2 August 26, 2003

3

3. Block Diagram

Program/Speech/Melody/Instrument waveform

Address Pointers/ STACK

SRAM (256 nibbles)

IO1

Timer

ALU

IO2

IO3

4. PIN ASSIGNMENT

Symbol I/O Function Description

P13 ~ P10 I/O Bit3 ~ Bit0 of I/O port 1
P23 ~ P20 I/O Bit3 ~ Bit0 of I/O port 2
P33 ~ P30 I/O Bit3 ~ Bit0 of I/O port 3
P43 ~ P40 I/O Bit3 ~ Bit0 of I/O port 4
P53 ~ P50 I/O Bit3 ~ Bit0 of I/O port 5
P63 ~ P60 I/O Bit3 ~ Bit0 of I/O port 6
VDD P Positive power supply
GND P Negative power supply
XIN I Crystal In
RST I Chip Reset (Active high)
XOUT/OSC O Crystal Out / Rosc In
CKSEL I Clock type select (Internal pull low)

BUO1/VO1 O Positive Output of PWM or DA1
BUO2/VO2 O Negative Output of PWM or DA2

SNC698

4-Channel Speech Controller

ROM

256K×12 bits

Sampling Rate Counter × 4

IO4

‘L’ or floating → RC oscillator
‘H’ →Crystal

Generator

Voice

Synthesizer

IO5

IO6

Timing

OSC

Volume

Control

PWM

8bit D/A

Ver: 1.2 August 26, 2003

4

SNC698

4-Channel Speech Controller

5. FUNCTION DESCRIPTIONS

5.1 Oscillator

SNC698 accepts crystal oscillator / ceramic resonator or RC type oscillator (selected
by pin CKSEL) for system clock. The typical circuit diagrams for oscillator are listed as
follows.

VDD

SNC698SNC698

15pF

CKSEL

XOUT/ROS C

XIN

CKSEL

8MHZ

15pF

XO UT /R O S C

XIN

100K

8MHZ Crystal 8M Rosc

5.2 ROM

SNC698 contains 256K words (12-bit) internal ROM. Program, voices, melodies, data,
and instrument waveforms share the same ROM with the others.

5.3 RAM

SNC698 contains 256 nibble RAM. The 256 nibble RAM is separated into four pages
(page 0, page1, page2 and page 3). An implicit page indicator is utilized to specify
page address. Four instructions, PAGE0, PAGE1, PAGE2 and PAGE3, can switch
the page indicator. All 64 nibbles of each page can be accessed by direct mode (to
specify M0 ~ M63 in the data transfer type instructions.)

5.4 Power Down Mode

“End” instruction will let SNC698 enter power down mode and consumer very little
amount of current. (<3uA @VDD=3V and <5uA @VDD=5V) After SNC698 enters
power down mode, any valid data transition (LH or HL) occurring on any IO ports
(P1 to P6) lead SNC698 back to normal operation mode.

5.5 Sampling Rate Counters

4 independent sampling rate counters are dedicated to 4 individual voice channels to
play voices with different playing rates. The playing rate is programmable from 4KHz
to 40KHz. The resolution of sampling period of each sampling rate counter is 0.25 uS.
This feature helps SNC698 play sounds with accurate pitches in the case of music
instrument synthesis.

Ver: 1.2 August 26, 2003

5

SNC698

4-Channel Speech Controller

5.6 Auto Repetition

Auto repetition function helps SNC698 realize a “looping” sound automatically by
hardware without any software effort. Auto repetition function is a very useful
mechanism to implement “Sustain” sound in instrument synthesis. All 4 channels are
equipped with this function. Arbitrary lengths of looping sound are accepted by
SNC698.

5.7 I/O Ports

P1 to P6 are six 4-bit I/O ports. Any bit of each I/O port can be programmed to be input
or output individually. Any valid data transition (H L or LH) of each I/O port can
reactivate the chip when it is in power-down stage.

Port Data

Port Status

To Internal Data Bus

Read Control

I/O Port Configuration

Note: weak N-MOS’s can serve as pull-low resistors.

PAD

Weak

Ver: 1.2 August 26, 2003

6

SNC698

4-Channel Speech Controller

5.8 IR Function

P33 can be modulated with 38.5KHz square wave before sent out to P33 pin. The IR
signal can be achieved by this modulated signal.

38.5KHZ

"1"

Mode

P33

PAD

5.9 8-bit DAC

An 8-bit current type digital-to-analog converter is built-in SNC698. The relationship
between of input digital data and output analog current signal is listed in the following
table. Also, the recommended application circuit is illustrated as follows.

Input data Typical value of output current (mA)
0 0
1 3/255
…
N n*(3/255)
…
255 3

VCC

VO

1K

SNC698

D/A Speaker Application

Ver: 1.2 August 26, 2003

7

SNC698

4-Channel Speech Controller

5.10 8-bit PWM

A PWM (pulse width modulation) circuit is built-in SNC698. PWM can convert input
digital data into pulse trains with suitable different pulse width. The maximum
resolution of PWM is 8 bits. Two huge output stage circuits are included in SNC698.
Both of them are capable of driving speaker directly. Besides, 15 level PWM output
current is provided for volume adjust function.

# VOL[3..0] Output Current

(VDD=3V, Vo=1.5V)
0 0000 120mA
1 0001 105mA
2 0010 90mA
3 0011 75mA
4 0100 60mA
5 0101 52.5mA
6 0110 45mA
7 0111 37.5mA
8 1000 30mA
9 1001 22.5mA

A 1010 15mA

B 1011 10.25mA
C 1100 7.5mA
D 1101 3.75mA

E 1110 3.75mA

F 1111 0mA

15 levels PWM output current control

BUO1/VO

BUO2

PWM output

Ver: 1.2 August 26, 2003

8

SNC698

4-Channel Speech Controller

6. ABSOLUTE MAXIMUM RATING

Items Symbol Min Max Unit.

Supply Voltage VDD-V -0.3 6.0 V
Input Voltage VIN VSS-0.3 VDD+0.3 V
Operating Temperature TOP 0 55.0 oC
Storage Temperature T

-55.0 125.0 oC

STG

7. ELECTRICAL CHARACTERISTICS

Item Sym. Min. Typ. Max. Unit Condition

Operating Voltage VDD 2.4 3.0 5.5 V
Standby Current I

Operating Current
(ROSC Mode)

Operating Current
(XTAL Mode)

I/O port Input Current IIH - - 3

I/O port Drive Current IOD 1.5 2 2

I/O port Sink Current IOS 2 4 3

D/A Output Current IVO 2 2 3

Oscillation Freq. F
IR Carrier Frequency Fir - 38.5 - KHz Fosc=8MHz

- - 2

SBY

I

- - 350

OPR

I

- - 800

OPR

5

1.5

1.5

10

-

-

-

-

-

-

10
30

uA VDD=3V

uA

mA

uA

mA

uA VDD=3V, VIN=3V

- - mA VDD=3V, VO=2.6V

5

- - mA VDD=3V, VO=0.4V

8

4 4 mA VDD=3V, VO=0.7V

3

- 8 - MHz VDD=3V

OSC

=4.5V

V

DD

VDD=3V, no load

=4.5V, no load

V

DD

(ROSC Mode)
VDD=3V, no load

=4.5V, no load

V

DD

(XTAL Mode)

=4.5V,VIN=4.5V

V

DD

=4.5V, VO=3.8V

V

DD

=4.5V, VO=0.8V

V

DD

=4.5V, VO=0.7V

V

DD

Ver: 1.2 August 26, 2003

9

SNC698

8. ROSC Performance

ROSC frequency vs VDD (Typical value, R=100KΩ)

100k

12
11
10

9
8
7

ROSC (MHz)

6
5
4

1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

VDD (Voltage)

4-Channel Speech Controller

100

ROSC frequency vs VDD (For various R)

12

11

10

9

8

7

ROSC (MHz)

6

5

4

1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

VDD (Voltage)

82k

91k

100k

110k

120k

Ver: 1.2 August 26, 2003

10

SNC698

9. APPLICATION CIRCUIT

RC Oscillator, D/A Speaker Output, 32 Scan Keys

4-Channel Speech Controller

8050

VDD

1K

VDD

0.1uF

100K

C1

0.1uF

VDD

VDD

C2

VO 1

GND

P42

P43

RST

P32

P33

P30

P31

XIN

SNC698

P12

P13

P20

P21

P22

P23

P40

P41

TR4

CKSEL

OSC/XOUT

P11

TR3

VDD

P10

TR2

TR1

TR8

TR1 2

TR1 6

TR20

TR24

TR2 8

TR3 2

TR7

TR1 1

TR1 5

TR19

TR23

TR2 7

TR3 1

TR6

TR1 0

TR1 4

TR18

TR22

TR2 6

TR3 0

TR5

TR9

TR1 3

TR17

TR21

TR2 5

TR2 9

Note: The C1 (0.1uF) between Power and GND should be closed to VDD pin of
SNC698 as possible.

Ver: 1.2 August 26, 2003

11

SNC698

4-Channel Speech Controller

Crystal Oscillator, PWM Speaker Output, 32 Scan Keys

C1

VDD

0.1uF

VDD

VDD

20pf

0.1uF

20pf

8MHz

C2

BUO2

BUO1

RST

P32

P33

P30

P31

OSC/XIN

XO UT

CKSEL

VDD

SNC698

GND

P11

P12

P13

P20

P21

P22

P23

P40

P41

P42

P43

TR4

TR8

TR3

TR7

P10

TR2

TR6

TR1

TR5

TR1 2

TR1 6

TR2 0

TR24

TR28

TR3 2

TR1 1

TR1 5

TR1 9

TR23

TR27

TR3 1

TR1 0

TR1 4

TR18

TR22

TR26

TR3 0

TR9

TR1 3

TR1 7

TR2 1

TR25

TR2 9

Note: The C1 (0.1uF) between Power and GND should be closed to VDD pin of
SNC698 as possible.

Ver: 1.2 August 26, 2003

12

10. BONDING PAD

P10

1

P11

2

3

P12

P13

4

P20

5

SNC698

4-Channel Speech Controller

P63

35

P62

34

P61

33

32

P60

P53

31

P52

30

29

P51

P50

28

P43

27

P42

26

P41

25

24

P40

P33

23

(0.00, 0.00)

22

21

20

19

18

17

16

15

P32

P31

P30

P23

P22

P21

GND

VDD

67 8 9

RST

GND

BUO1VO1

VDD

10

11

12

GND

BUO2/VO2

13

TEST

14

XIN

XOUT

Note: The substrate MUST be connected to Vss in PCB layout.

Ver: 1.2 August 26, 2003

13

SNC698

4-Channel Speech Controller

DISCLAIMER

The information appearing in SONiX web pages (“this publication”) is believed to be
accurate.
However, this publication could contain technical inaccuracies or typographical errors.
The reader should not assume that this publication is error-free or that it will be
suitable for any particular purpose. SONiX makes no warranty, express, statutory
implied or by description in this publication or other documents which are referenced
by or linked to this publication. In no event shall SONiX be liable for any special,
incidental, indirect or consequential damages of any kind, or any damages whatsoever,
including, without limitation, those resulting from loss of use, data or profits, whether or
not advised of the possibility of damage, and on any theory of liability, arising out of or
in connection with the use or performance of this publication or other documents which
are referenced by or linked to this publication.
This publication was developed for products offered in Taiwan. SONiX may not offer
the products discussed in this document in other countries. Information is subject to
change without notice. Please contact SONiX or its local representative for
information on offerings available. Integrated circuits sold by SONiX are covered by
the warranty and patent indemnification provisions stipulated in the terms of sale only.
The application circuits illustrated in this document are for reference purposes only.
SONIX DISCLAIMS ALL WARRANTIES, INCLUDING THE WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PURPOSE. SONIX reserves the right
to halt production or alter the specifications and prices, and discontinue marketing the
Products listed at any time without notice. Accordingly, the reader is cautioned to
verify that the data sheets and other information in this publication are current before
placing orders.
Products described herein are intended for use in normal commercial applications.
Applications involving unusual environmental or reliability requirements, e.g. military
equipment or medical life support equipment, are specifically not recommended
without additional processing by SONIX for such application.

Ver: 1.2 August 26, 2003

14