SONIX SNC21200A

SNC21200A
1-CH H.Q. Speech Controller
===================== CONTENTS =====================
1.
INTRODUCTION........................................................................................................... 3
2.
FEATURES ..................................................................................................................... 3
3.
PIN ASSIGNMENT........................................................................................................ 4
4.
BLOCK DIAGRAM ....................................................................................................... 4
5.
FUNCTION DESCRIPTIONS ...................................................................................... 5
5.1
5.2
5.3
OSCILLATOR .............................................................................................................. 5
ROM ......................................................................................................................... 5
RAM ......................................................................................................................... 5
5.4
5.5
5.6
5.7
POWER DOWN MODE ................................................................................................. 5
SAMPLING RATE COUNTER ........................................................................................ 5
AUTO REPEAT FUNCTION ........................................................................................... 5
I/O PORTS .................................................................................................................. 5
5.8
5.9
5.10
5.11
IR FUNCTION ............................................................................................................. 6
PWM IO CONTROL .................................................................................................... 6
WATCH DOG TIMER ................................................................................................... 6
PUSH-PULL DAC & CURRENT DA OUTPUT ............................................................... 7
5.12
EVENT MARK ............................................................................................................. 8
6.
ABSOLUTE MAXIMUM RATING ............................................................................. 9
7.
ELECTRICAL CHARACTERISTICS ........................................................................ 9
8.
APPLICATION CIRCUIT .......................................................................................... 10
8.1
8.2
Ver1.1
GENERAL APPLICATION ............................................................................................ 10
MOTOR APPLICATION ............................................................................................... 11
1
November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
AMENDENT HISTORY
Version
Ver1.0
Ver1.1
Ver1.1
Date
Description
September 4, 2009 First issue.
November 6, 2009
1. Add Current DAC description in page7
2
November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
1. INTRODUCTION
SNC21200A is a one-channel voice synthesizer IC with Push-Pull direct drive circuit.
It built-in a 4-bit tiny controller with four 4-bit I/O ports. By programming through the
tiny controller in SNC21200A, user’s varied applications including voice section
combination, key trigger arrangement, output control, and other logic functions can be
easily implemented.
2. FEATURES
Single power supply 2.4V – 5.5V
System Clock is 2MHz, the instruction cycle is 4us
200 seconds voice capacity are provided (@6KHZ sample rate)
Built in a 4-bit tiny controller
I/O Port
Four 4-bit I/O ports P1, P2, P3 and P6 are provided
The driving/sink current of P3.2 & P3.3 is up to 8mA/16mA
The IO pins P3.3 or P2.3 can be modulated with 38.5KHz carry signal to
implement IR function.
6 PWM output for IO (P3.0~P3.3 & P6.0~P6.1)
128*4 bits RAM are provided
Maximum 16k program ROM is provided
640K*10 shared ROM for voice data and program
Readable ROM code data
Built-in one channel High Quality speech synthesizer
Adaptive playing speed from 2.5k-20kHz is provided
Automatic repetition
Support 5-bit ADPCM and 10 bit PCM format.
Built in an 8-level volume control Push-Pull DAC circuit output, can directly
connected to Speaker for sound output.
12 bit Push-Pull DA output and 12 bit current DAC output
Event Mark function supported.
Low-Voltage Detect circuit
Watch Dog Timer Reset function.
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
3. PIN ASSIGNMENT
Symbol
P10~P13
P20~P23
P30~P33
P60~P63
RST
TEST
OSC
DAON
I/O
I/O
I/O
I/O
I/O
I
I
I
O
Function Description
I/O port 1: IO
I/O port 2: IO
I/O port 3: IO
I/O port 6: IO
Reset Chip (Active H)
Test Pin
Oscillation component connection pin
DAOP
O
Push-Pull output 2
DACO
O
I
I
I
I
Current DAC output
Positive power supply
Negative power supply
Positive power supply
Negative power supply
VDDIO
GNDIO
VDD
GND
Push-Pull output 1
4. Block Diagram
ROM
Program/Speech
Address Pointers/ STACK
SRAM (128 nibbles)
Timing
Generator
Sampling Rate Counter Watch Dog
Timer
Voice
Synthesizer
Timer
ALU
Ver1.1
Push-Pull
Circuit
Current
DAC Circuit
PWM IO
IO port 1
OSC
IO port 2
IO port 3
4
IO port 6
November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
5. FUNCTION DESCRIPTIONS
5.1 Oscillator
System clock define 2MHz, the source provided by external resistor ring oscillator.
5.2 ROM
SNC21200A contains a substantial maximum 640K words (10-bit) internal ROM,
which is shared by program and resource data. Program, voice and data are shared
within this same 640K words ROM.
5.3 RAM
SNC21200A contains maximum 128 nibble RAM (128 x 4-bits). The 128 nibble RAM
is divided into eight pages (page 0 to page 7, 16 nibble RAM on each page). In our
programming structure, users can use the instructions, PAGE n (n=0 to 7) to switch
and indicate the RAM page. Besides, users can use direct mode, M0 ~ M15 in the
data transfer type instructions, to access all 16 nibbles of each page.
5.4 Power Down Mode
“End” instruction makes the IC entering into Stop Mode will stop the system clock for
power savings (<3uA @VDD=3V and <6uA @VDD=4.5V.) Any valid data transition
(LH or HL) occurring on any IO pin can be used to start the system clock and
return to normal operating mode.
5.5 Sampling Rate Counter
The unique sampling rate counter is designed in voice channel to be able to play
diverse voices at different sample playing rates. The playing rate can be adaptively
set up among from the wide ranges of 2.5KHz to 20KHz. This architecture yields a
high-quality voice synthesis that sounds very close to its original source when played
through the same amplifier and speaker circuitry.
5.6 Auto Repeat Function
A voice section can be repeated by the built-in special hardware of SNC21200A
without any software effort. The function activated by setting the corresponding bit of
a control register. Once the control register was setting, the channel will continue to
play the voice section (the Next Section).
5.7 I/O Ports
There are four 4-bit I/O ports P1, P2, P3 and P6. Any I/O can be individually
programmed as either input pull low or output. Any valid data transition (H L or
LH) of P1, P2, P3 and P6 can reactivate the chip when it is in power-down stage.
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
PA
D
Port
Data
Port
Status
Wea
k
To Internal Data Bus
Read Control
I/O Port Configuration
Note:
(1) Weak N-MOS can serve as pull-low resistor.
(2) The driving/sink current of P3.3 & P3.2 is up to 8mA/16mA
5.8 IR Function
Bit 3 of Mode Register is applied to control the IR function. P33 can be modulated with
38.5KHz square wave before sent out to P3.3 or P2.3 pin. P3.3 and P2.3 out is
controlled by Mode1.1. If Mode1.1 set 1 IR is use P2.3, set “0” is use P3.3. The IR
signal can be achieved by this modulated signal.
5.9 PWM IO control
SNC21200A has support 6 PWM IO (P3.0~P3.3 & P6.0~P6.1). Each I/O has 8 bit
independent duty register, and the 8 bit register are compare with 8 bits counter. If set
use PWM IO function and internal counter start at 000H, the mapping I/O will set High.
The 8 bits counter increment if the same duty-register, that will reset the mapping IO
pin.
5.10 Watch Dog Timer
SNC21200A built-in an internal WDT (Watch Dog Timer). This Watchdog timer would
issue resets signal to this chip if it is not cleared before reaching terminal count (1 sec).
The watchdog timer is enabled at reset and cannot be disabled.
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
5.11 Push-Pull DAC & Current DA Output
SNC21200A is an advanced chip to be designed having two optimal methods to
play out the voices. One is DAC and the other is Push-Pull DAC. Upon user’s
applications, user can select either DAC or Push-Pull DAC in his design. Please be
aware that only one method can be activated at the time.
Push-Pull DAC: An 8-level volume control Push-Pull DAC circuit is built-in
SNC21200A. The maximum resolution of Push-Pull DAC is 12 bits. Two huge
output stage circuits are designed in SNC21200A. With this advanced circuit, the
chip is capable of driving speaker directly without external transistors.
DAON
DAOP
Push-Pull DAC Output
DAC: A 12-bit current type digital-to-analog converter is built-in SNC21200A
VCC
DACO
1K
DAC Output
Ver1.1
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
5.12 Event Mark
This is a new function for SNC21200A series, it allows user to add a special mark in
wave data by the voice edit tool “CoolEdit”, ”Goldwav”, “SoundForge”. User can
insert event tags in anywhere of his wave file and can easy to get this special code to
do his special action during voice playing. That means, it should be easily to control
the I/O (such as LED or Motor) and other actions to synchronize with voice.
Ver1.1
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
6. ABSOLUTE MAXIMUM RATING
Items
Supply Voltage
Input Voltage
Operating Temperature
Storage Temperature
Symbol
VDD-V
VIN
TOP
TSTG
Min
-0.3
VSS-0.3
0
-55.0
Max
6.0
VDD+0.3
55.0
125.0
Unit.
V
V
o
C
o
C
7. ELECTRICAL CHARACTERISTICS
Item
Operating Voltage
Standby current
Sym. Min.
VDD
2.4
ISBY
-
Operating Current
IOPR
Input current of
IIH
P1, P2, P3, P6
Drive current of
IOD
P1, P2, P3.0, P3.1, P6
Sink Current of
IOS
P1, P2, P3.0, P3.1, P6
Drive current of P3.2, P3.3 IOD
Sink current of P3.2, P3.3 IOS
Push-Pull current
IPP
Push-Pull current
Drive Current of DACO
Oscillation Freq.
Ver1.1
IPP
IOD
FOSC
-
Typ. Max. Unit
Condition
3.0
5.5
V
3.0
uA VDD=3V, no load
5.0
VDD=4.5V, no load
300
uA VDD=3V, no load
3.0
uA VDD=3V,VIN=3V
3
4
-
mA VDD=3V,VO=2.4V
4
6
-
mA VDD=3V,VO=0.4V
6
10
-
8
16
70
-
-
100
-
1.98
3
2.05
2.12
mA VDD=3V,VO=2.4V
mA VDD=3V,VO=2.4V
mA VDD=3V, Output 1K
Sin wave.
mA VDD=4.5V, Ouput 1K
Sin wave.
mA VDD=3V, DACO=0.7V
MHz VDD=3V Temp.=25℃
Min : -3%
Max : +3%
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
8. APPLICATION CIRCUIT
8.1 General application
C1
104
3 *1.5AA
VDDIO
RST
GNDIO
-
CVDD
OSC
SNC21XXX A
+
R1
2200K
22
IO1
IO2
IO3
IO4
IO5
CGND
Battery
Box
It is suggested to add a capacitor (C1), 104, between VDD with GND to keep
power stable with general application. And this capacitor is strongly
suggested to be as close to the chip as possible.
Ver1.1
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November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
8.2 Motor application
Separate CPU power path with
power path of large current
application
R2
10Ω
Ω
10
+
VDDIO
M
R1
220
220K Ω
CVDD
Battery
Box
C2
104
RST
GNDIO
SNC21XXXA
3* 1.5 AA
OSC
IO1
IO2
C1
104
IO3
IO4
IO5
CGND
Rb1
100Ω
Ω
100
C3
104
C4
104
M
8050
8050
Rb2
100Ω
100Ω
Separate CPU GND with large
current application GND
There are some suggestions about PCB layout when user use
SNC21XXXA series IC with motor applications.
(1) The capacitor C1 (104) C2 (104) is strongly suggested to be as close to the chip
as possible.
(2) It had better let OSC components (R) get close to IC chip.
(3) OSC components had better get far away large current applications.
(4) Separate IC power path with large current application power path to avoid affect
IC working by power drop from large current application.
(5) R2 (10Ω)separate VDDIO and CVDD.
(6) Let power cable thicker, especially for large current application.
(7) C3 and C4 (104) are connected at the positive point and negative point of the
motor.
Ver1.1
11
November 6, 2009
SNC21200A
1-CH H.Q. Speech Controller
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Ver1.1
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November 6, 2009