SONIX SNC26168

SNC26168
One Channel 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
OSCILLATOR ...............................................................................................................5
ROM ..........................................................................................................................5
5.3
5.4
RAM ..........................................................................................................................6
POWER DOWN MODE ..................................................................................................6
5.5
5.6
5.7
5.8
SAMPLING RATE COUNTER .........................................................................................6
I/O PORTS ...................................................................................................................6
PWM OUTPUT ............................................................................................................7
WATCH DOG TIMER ....................................................................................................7
5.9
5.10
IR FUNCTION ..............................................................................................................7
PWM IO CONTROL .....................................................................................................7
6.
ABSOLUTE MAXIMUM RATING ..............................................................................7
7.
ELECTRICAL CHARACTERISTICS .........................................................................8
8.
APPLICATION CIRCUIT .............................................................................................9
8.1
8.2
Ver: 1.7
GENERAL APPLICATION ...............................................................................................9
MOTOR APPLICATION ................................................................................................10
1
October 14, 2009
SNC26168
One Channel Speech Controller
AMENDENT HISTORY
Version
Date
Description
Ver 1.0
Nov. 6, 2008
First issue
Ver 1.1
Nov. 17, 2008
Revise CVDD & VDDIO order of “Motor Application”
Ver 1.2
Jan. 6, 2009
Just revise version following with 4/8/12 IO body
Ver 1.3
Feb. 13, 2009
1. Revise Rosc=220K Ohm in Application Circuit part
Ver 1.4
May 6, 2009
1. Revise frequency guarantee range in electrical
characteristics according IC Test flow
Ver 1.5
June 23, 2009
No modification, just revise version following with
updating SNC26500 IO numbers.
Ver 1.6
July 23, 2009
Revise system clock with 2.05MHz (typical).
Ver 1.7
October 14, 2009
1. Revise PWM output spec condition with BUOx=1/2
VDD (peak value), instead of 1KHz sine wave
Ver: 1.7
2
October 14, 2009
SNC26168
One Channel Speech Controller
1. INTRODUCTION
SNC26168 is a one-channel voice synthesizer IC with PWM direct drive circuit. It built
in a 4-bit tiny controller with one 4-bit input port and two 4-bit I/O ports. By
programming through the tiny controller in SNC26168, 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
168 seconds voice capacity are provided (@6KHZ sample rate)
Built in a 4-bit tiny controller
I/O Port
− One 4-bit Input port P1is provided.
− Three 4-bit I/O ports P2, P3 and P6 are provided.
− The driving/sink current of P2 & P3 is up to 8mA/16mA
− The IO pins P2.3 can be modulated with 38.5Khz carry signal to implement IR
function.
− PWM output for IO (P2.0~P2.3, P3.0~P3.3)
128*4 bits RAM are provided
Maximum 64k program ROM is provided
352K*12 shared ROM for voice data and program
Readable ROM code data
Voice Synthesizer:
− Single channel speech output.
− Support 4-bits SONiX-ASDPCM and 8-bit PCM algorithm
Adaptive playing speed from 2.5k-20kHz is provided
Built in an PWM circuit output, can directly connected to Speaker for sound
output.
System clock: 2MHz
Event Mark function supported
Low Power Detect.
Watch Dog Timer Supported
Ver: 1.7
3
October 14, 2009
SNC26168
One Channel Speech Controller
3. PIN ASSIGNMENT
Symbol
P10~P13
P20~P23
P30~P33
P60~P63
Rosc
BUO1
I/O
I
I/O
I/O
I/O
I
O
Function Description
Input port 1
I/O port 2: IO
I/O port 3: IO
I/O port 6: IO
Oscillation component connection pin
BUO2
O
RST
I
PWM output 2
RST=1 Reset Chip (Active H)
CVDD
I
Positive power supply for CPU
CGND
I
Negative power supply for CPU
VDDIO
GNDIO
Test
I
I
I
Positive power supply for I/O
Negative power supply for I/O
Test pin
PWM output 1
4. Block Diagram
ROM
Program/Speech
352K×12 bits
Address Pointers/ STACK
SRAM (128 nibbles)
Timing
Generator
OSC
Sampling Rate Counter
Watch Dog
Timer
Voice
Synthesizer
PWM
Circuit
Timer
ALU
PWM IO
Input port 1
Ver: 1.7
IO port 2
IO port 3
4
IO port 6
October 14, 2009
SNC26168
One Channel Speech Controller
5. FUNCTION DESCRIPTIONS
5.1 Oscillator
SNC26168 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
VCC
r
OSC
RC Oscillator
5.2 ROM
SNC26168 contains a substantial 352K words (12-bit) internal ROM, which is shared
by program and resource data. Program, voice and data are shared within this same
352K words ROM.
Ver: 1.7
5
October 14, 2009
SNC26168
One Channel Speech Controller
5.3 RAM
SNC26168 contains 128 nibble RAM (128 x 4-bits). The 128 nibble RAM is divided
into two pages (page 0, 64 nibbles ; page1, 16 nibbles RAM). In our programming
structure, users can use the instructions, PAGE n (n=0 or 1) to switch and indicate the
RAM page. Besides, users can use direct mode, M0 ~ M63 in the data transfer type
instructions, to access first 64 nibbles of page0 and the last 64 nibbles of page1.
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 I/O Ports
There are one 4-bit input port P1 and two 4-bit I/O ports P2 and P3. Any I/O can be
individually programmed as either input pull low or output. Any valid data transition
(H L|LH) of P1, P2 and P3 can reactivate the chip when it is in power-down stage.
Port Data
PAD
Port Status
Weak
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 P2 & P3 is up to 8mA/16mA
Ver: 1.7
6
October 14, 2009
SNC26168
One Channel Speech Controller
5.7 PWM Output
An PWM circuit is built-in SNC26168. The maximum resolution of PWM is 8 bits.
Two huge output stage circuits are designed in SNC26168. With this advanced
circuit, the chip is capable of driving speaker directly without external transistors.
BUO1
BUO2
PWM Output
5.8 Watch Dog Timer
SNC26168 built 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 (128
ms). The watchdog timer is enabled at reset and cannot be disabled.
5.9 IR Function
P23 can be modulated with 38.5KHz square wave before sent out to P23 pin.
The IR signal can be achieved by this modulated signal.
5.10
PWM IO control
SNC26168 has support 8 PWM IO (P20~P23, P30~P33). 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.
6. ABSOLUTE MAXIMUM RATING
Items
Supply Voltage
Input Voltage
Operating Temperature
Storage Temperature
Ver: 1.7
Symbol
VDD-V
VIN
TOP
TSTG
Min
-0.3
VSS-0.3
0
-55.0
7
Max
6.0
VDD+0.3
55.0
125.0
Unit.
V
V
o
C
o
C
October 14, 2009
SNC26168
One Channel Speech Controller
7. ELECTRICAL CHARACTERISTICS
Item
Operating Voltage
Standby current
Operating Current
Input current of
P1, P2, P3 & P6
Drive current of P6
Sink current of P6
Drive current of P2, P3
Sink current of P2, P3
PWM current
PWM current
Oscillation Freq.
Ver: 1.7
Sym. Min. Typ. Max. Unit
Condition
VDD 2.4
3.0
5.5
V
ISBY
3.0
uA VDD=3V, no load
6.0
VDD=4.5V, no load
IOPR
300
uA VDD=3V, no load
IIH
3.0
uA VDD=3V,VIN=3V
IOD
IOS
IOD
IOS
IPWM
IPWM
FOSC
3
4
6
10
1.98
4
mA
6
mA
8
mA
16
mA
240
mA
310
mA
2.05 2.12 MHz
8
VDD=3V,VO=2.4V
VDD=3V,VO=2.4V
VDD=3V,VO=2.4V
VDD=3V,VO=2.4V
VDD=3V, BUOx=1.5V
VDD=4.5V, BUOx=2.25V
VDD=3V, Temp.=25oC
@Rosc = 220 Kohm
Min : -3%
Max : +3%
October 14, 2009
SNC26168
One Channel Speech Controller
8. APPLICATION Circuit
8.1 General application
+
IO1
IO2
IO3
IO4
IO5
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.
Ver: 1.7
9
October 14, 2009
SNC26168
One Channel Speech Controller
8.2 Motor application
Separate CPU power path with
power path of large current
application
+
8050
IO1
IO2
Battery
Box
8050
IO3
IO4
IO5
Separate CPU GND with large
current application GND
There are some suggestions about PCB layout when user use SNC26000
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.
Ver: 1.7
10
October 14, 2009
SNC26168
One Channel Speech Controller
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Ver: 1.7
11
October 14, 2009