SNC119
One Channel Direct Drive Speech Controller
1 INTRODUCTION
SNC119 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, two 4-bit I/O ports. By
programming through the tiny controller in SNC119, 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
61 seconds voice capacity are provided(@6KHZ sample rate)
Built in a 4-bit tiny controller
One 4-bit input port, two 4-bit I/O ports are provided
64*4 bits RAM are provided
184K*10 ROM size are provided for voice data and program
Maximum 16k program ROM is provided
Built in a high quality speech synthesizer
Adaptive playing speed from 2.5k-20kHz is provided
One voice channel
Built in a PWM Direct Drive circuit and a fixed current D/A output
System clock : 2MHz
Low Power Reset
Ver: 1.1 August 26, 2003
1
3 Block Diagram
Address Pointers/ STACK
SRAM (64 nibbles)
Timer
ALU
Input port 1
One Channel Direct Drive Speech Controller
ROM
Program/Speech
184K×10 bits
Sampling Rate Counter
IO port 2 IO port 3
Timing
Generator
Voice
Synthesizer
SNC119
OSC
PWM
D/A
4 PIN ASSIGNMENT
Symbol I/O Function Description
P13 ~ P10 I Bit3 ~ Bit0 of Input port 1
P23 ~ P20 I/O Bit3 ~ Bit0 of I/O port 2
P33 ~ P30 I/O Bit3 ~ Bit0 of I/O port 3
VDD P Positive power supply
GND P Negative power supply
RST I Reset pin (active high)
OSC I Oscillator Input
BUO1/VO O Positive Output of PWM or DA output
BUO2 O Negative Output of PWM
Ver: 1.1 August 26, 2003
2
SNC119
One Channel Direct Drive Speech Controller
5 FUNCTION DESCRIPTIONS
5.1. Oscillator
SNC119 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
VCC
OSC
r
RC Oscillator
5.2. ROM
SNC119 contains substantial 184K word (10-bit) internal ROM. Program, voices and
other data are shared with this same 184K word ROM.
5.3. RAM
SNC119 contains 64 nibble RAM. The 64 nibble RAM is divided into four pages (page
0 to page 3, 16 nibble RAM on each page). In our programming structure, users can
easily define and locate RAM page in the program. For instance, users can use the
instructions, PAGEn (n=0 to 3) 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 will power down SNC119 and enable IC to consume fewer current for
power saving. (<3uA @VDD=3V and <5uA @VDD=5V) Please be aware that when
the power down mode is activated in SNC119, any valid data transition (LH or HL)
occurring on any input port (P1) or IO ports (P2 and P3) will lead SNC119 back to
normal operation 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 feature makes voice
close to its original source and yield the better voice quality.
Ver: 1.1 August 26, 2003
3
SNC119
One Channel Direct Drive Speech Controller
5.6. I/O Ports
P1 is a 4-bit input port, P2 and P3 are two 4-bit I/O ports. Any bit of P2 and P3 can
be programmed as either input or output port individually. Any valid data transition
(H L or LH) of P1, P2 and P3 can reactivate the chip when the chip is in
power-down mode.
PAD
To Internal Data Bus
Read Control
Weak
Input Port Configuration (P10~P13)
Port Data
PAD
Port Status
Weak
To Internal Data Bus
Read Control
I/O Port Configuration (P20~P23, P30~P33)
Note: All weak N-MOS’s can serve as pull-low resistors.
Ver: 1.1 August 26, 2003
4
SNC119
One Channel Direct Drive Speech Controller
5.7. DAC & PWM
SNC119 is an advanced chip to be designed having two optimal methods to play
out the voices. One is DAC and the other is PWM. Upon user’s applications, user
can select either DAC or PWM in his design. Please be aware that only one
method can be activated at a time.
DAC: A 7-bit current type digital-to-analog converter is built-in SNC119. The
relationship between 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 3/127
…
N n*(3/127)
…
127 3
VCC
BUO1/VO
1K
DAC output
Ver: 1.1 August 26, 2003
5
SNC119
One Channel Direct Drive Speech Controller
PWM: A PWM (pulse width modulation) circuit is built-in SNC119. PWM can
convert input digital data into pulse trains with suitable different pulse width. The
maximum resolution of PWM is 7 bits. Two huge output stage circuits are
designed in SNC119. With this advanced circuit, the chip is capable of driving
speaker directly without external transistors. The recommended application
circuit is illustrated as follows.
BUO1/VO
BUO2
PWM Output
Ver: 1.1 August 26, 2003
6
SNC119
One Channel Direct Drive 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
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 I
Input current of
P1, P2, P3
Drive current of
P2, P3
Sink Current of
P2, P3
Drive current of Buo1 IOD 100 120 - mA VDD=3V,Buo1=1.5V
Sink Current of Buo1 IOS 100 120 - mA VDD=3V,Buo1=1.5V
SBY
OPR
IIH - 3.0 10.0 uA VDD=3V,VIN=3V
IOD - 4 - mA VDD=3V,VO=2.4V
IOS - 6 - mA VDD=3V,VO=0.4V
-55.0 125.0 oC
STG
- 2.0
5.0
- 300
700
- uA VDD=3V , no load
V
- uA VDD=3V , no load
V
=4.5V, no load
DD
=4.5V, no load
DD
Drive Current of Buo2 IOD 100 120 - mA VDD=3V,Buo2=1.5V
Sink Current of Buo2 IOS 100 120 - mA VDD=3V,Buo2=1.5V
Oscillation Freq. F
- 2.0 - MHz VDD=3V
OSC
Ver: 1.1 August 26, 2003
7
One Channel Direct Drive Speech Controller
8 FOSC Performance
ROSC frequency vs VDD (Typical value, R=120KΩ)
3
2.5
2
Fosc (MHz)
1.5
234.55.5
VDD (Voltage)
SNC119
120k
ROSC frequency vs. VDD (For various R)
3
2.5
2
Fosc (MHz)
1.5
234.55.5
VDD (Voltage)
100k
110k
120k
130k
150k
Ver: 1.1 August 26, 2003
8
9 APPLICATION CIRCUIT
D/A Speaker Output
SNC119
One Channel Direct Drive Speech Controller
16 Scan Keys
GND
8050
VDD
1K
P30
P31
P32
VO 1
P33
C2
0.1uF
RST
OSC
C1
0.1uF
R
VDD
VDD
VDD
SNC119
P23
TR4
TR8
TR1 2
TR1 6
TR3
TR7
TR1 1
TR1 5
P10
TR2
TR6
TR1 0
TR1 4
TR1
TR5
TR9
TR1 3
P11
P12
P13
P20
P21
P22
Note: The C1 (0.1uF) between Power and GND should be closed to VDD pin of
SNC119 as possible.
Ver: 1.1 August 26, 2003
9
10 BONDING PAD
P10
P11
P12
P13
P20
P21
OSC
SNC119
One Channel Direct Drive Speech Controller
(0.00,0.00)
RST
19
P33
18
17
P32
1
2
3
4
5
6
7
8 9 10 11 12
16
15
14
13
P31
P30
P23
P22
GND
BUO1
VDD
GND
BUO2
SNC119
Note: The substrate MUST be connected to Vss in PCB layout.
Ver: 1.1 August 26, 2003
10
SNC119
One Channel Direct Drive 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: 1.1 August 26, 2003
11
Loading...