SNC26011
One Channel Speech Controller
===================== CONTENTS =====================
1.
2.
3.
4.
5.
INTRODUCTION............................................................................................................3
FEATURES ......................................................................................................................3
PIN ASSIGNMENT.........................................................................................................4
BLOCK DIAGRAM ........................................................................................................4
FUNCTION DESCRIPTIONS .......................................................................................5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
6.
7.
8.
O
SCILLATOR
...............................................................................................................5
ROM ..........................................................................................................................5
RAM ..........................................................................................................................6
P
OWER
D
OWN
M
ODE
..................................................................................................6
S
AMPLING
R
ATE
C
OUNTER
.........................................................................................6
I/O P
ORTS
...................................................................................................................6
PWM O
UTPUT
............................................................................................................7
W
ATCH
D
OG
T
IMER
....................................................................................................7
IR F
UNCTION
..............................................................................................................7
PWM IO
CONTROL
.....................................................................................................7
ABSOLUTE MAXIMUM RATING ..............................................................................7
ELECTRICAL CHARACTERISTICS .........................................................................8
APPLICATION CIRCUIT .............................................................................................9
8.1
8.2
G
ENERAL APPLICATION
...............................................................................................9
M
OTOR APPLICATION
................................................................................................10
Ver: 1.7
1
October 14, 2009
SNC26011
One Channel Speech Controller
AMENDENT HISTORY
Version
Ver 1.2
Ver 1.3
Ver 1.4
Date
Jan. 7, 2009
Feb. 13, 2009
May 6, 2009
First issue
1. Revise Rosc=220K Ohm in Application Circuit part
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
Ver 1.7
July 23, 2009
October 14, 2009
Revise system clock with 2.05MHz (typical).
1. Revise PWM output spec condition with BUOx=1/2
VDD (peak value), instead of 1KHz sine wave
Description
Ver: 1.7
2
October 14, 2009
SNC26011
One Channel Speech Controller
1. INTRODUCTION
SNC26011 is a one-channel voice synthesizer IC with PWM direct drive circuit. It built
in a 4-bit tiny controller with one 4-bit I/O ports. By programming through the tiny
controller in SNC26011, 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
10 seconds voice capacity are provided (@6KHZ sample rate)
Built in a 4-bit tiny controller
I/O Port
−
One 4-bit I/O ports P2 is provided.
−
The driving/sink current of P2 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)
(64+8)*4 bits RAM are provided.
(Notes
: m0~m63 + 8 PWMIO duty registers)
Maximum 24K program ROM is provided
24K*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
SNC26011
One Channel Speech Controller
3. PIN ASSIGNMENT
Symbol
P20~P23
Rosc
BUO1
BUO2
RST
CVDD
CGND
VDDIO
GNDIO
Test
I/O
I/O
I
O
O
I
I
I
I
I
I
Function Description
I/O port 2: IO
Oscillation component connection pin
PWM output 1
PWM output 2
RST=1 Reset Chip (Active H)
Positive power supply for CPU
Negative power supply for CPU
Positive power supply for I/O
Negative power supply for I/O
Test pin
4.
Block Diagram
ROM
Program/Speech
24K×12 bits
Address Pointers/ STACK
SRAM (64+8 nibbles)
Timing
Generator
OSC
Sampling Rate Counter
Watch Dog
Timer
PWM
Circuit
Timer
ALU
Voice
Synthesizer
PWM IO
IO port 2
Ver: 1.7
4
October 14, 2009
SNC26011
One Channel Speech Controller
5. FUNCTION DESCRIPTIONS
5.1 Oscillator
SNC26011 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
VCC
OSC
RC Oscillator
5.2 ROM
SNC26011 contains a substantial 24K words (12-bit) internal ROM, which is shared by
program and resource data. Program, voice and data are shared within this same 24K
words ROM.
Ver: 1.7
5
r
October 14, 2009
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
