View SNC26500_4629604.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SNC26500
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. OSCILLATOR ...............................................................................................................5 ROM ..........................................................................................................................5 RAM ..........................................................................................................................6 POWER DOWN MODE ..................................................................................................6 SAMPLING RATE COUNTER .........................................................................................6 I/O PORTS ...................................................................................................................6 PWM OUTPUT ............................................................................................................7 WATCH DOG TIMER....................................................................................................7 IR FUNCTION ..............................................................................................................7 PWM IO CONTROL .....................................................................................................7
ABSOLUTE MAXIMUM RATING ..............................................................................7 ELECTRICAL CHARACTERISTICS .........................................................................8 APPLICATION CIRCUIT .............................................................................................9 8.1 8.2 GENERAL APPLICATION ...............................................................................................9 MOTOR APPLICATION ................................................................................................10
Ver: 1.8
1
October 14, 2009
SNC26500
One Channel Speech Controller
AMENDENT HISTORY
Version Ver 1.4 Ver 1.5 Date June 10, 2009 June 23, 2009 First issue Revise total IO numbers from 4 Input + 12 IOs to 4 Input + 20 IOs Ver 1.6 Ver 1.7 Ver 1.8 July 23, 2009 September 30, 2009 October 14, 2009 Revise system clock with 2.05MHz (typical). Revise operating current spec 1. Revise PWM output spec condition with BUOx=1/2 VDD (peak value), instead of 1KHz sine wave Description
Ver: 1.8
2
October 14, 2009
SNC26500
One Channel Speech Controller
1. INTRODUCTION
SNC26500 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 five 4-bit I/O ports. By programming through the tiny controller in SNC26500, 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 500 seconds voice capacity are provided (@6KHZ sample rate) Built in a 4-bit tiny controller I/O Port - One 4-bit Input port P1 is provided. - Five 4-bit I/O ports P2, P3, P4, P5 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 1024K*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: 1.8
3
October 14, 2009
SNC26500
One Channel Speech Controller
3. PIN ASSIGNMENT
Symbol P10~P13 P20~P23 P30~P33 P40~P43 P50~P53 P60~P63 Rosc BUO1 BUO2 RST CVDD CGND VDDIO GNDIO Test I/O I I/O I/O I/O I/O I/O I O O I I I I I I Function Description Input port 1 I/O port 2: IO I/O port 3: IO I/O port 4: IO I/O port 5: IO I/O port 6: 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 1024Kx12 bits Address Pointers/ STACK SRAM (128 nibbles) Timing Generator
OSC
Sampling Rate Counter
Watch Dog Timer PWM Circuit
Timer ALU
Voice Synthesizer PWM IO
Input port 1
IO port 2 IO port 5
IO port 3 IO port 6
IO port 4
Ver: 1.8
4
October 14, 2009
SNC26500
One Channel Speech Controller
5. FUNCTION DESCRIPTIONS 5.1 Oscillator
SNC26500 accepts RC type oscillator for system clock. The typical circuit diagram for oscillator is listed as follows.
VCC OSC
RC Oscillator 5.2 ROM
SNC26500 contains a substantial 1024K words (12-bit) internal ROM, which is shared by program and resource data. Program, voice and data are shared within this same 1024K words ROM.
Ver: 1.8
5
r
October 14, 2009
SNC26500
One Channel Speech Controller
5.3 RAM
SNC26500 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 (L H or H L) 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 five 4-bit I/O ports P2 ~ P6. Any I/O can be individually programmed as either input pull low or output. Any valid data transition (H L|L H) of P1 ~ P6 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: 1.8
6
October 14, 2009
SNC26500
One Channel Speech Controller
5.7 PWM Output
An PWM circuit is built-in SNC26500. The maximum resolution of PWM is 8 bits. Two huge output stage circuits are designed in SNC26500. With this advanced circuit, the chip is capable of driving speaker directly without external transistors.
BUO1
BUO2
PWM Output
5.8 Watch Dog Timer
SNC26500 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
SNC26500 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 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
Ver: 1.8
7
October 14, 2009
SNC26500
One Channel Speech Controller
7. ELECTRICAL CHARACTERISTICS
Item Operating Voltage Standby current Operating Current Input current of P1, P2, P3, P4, P5 & P6 Drive current of P4, P5 & P6 Sink current of P4, P5 & P6 Drive current of P2, P3 Sink current of P2, P3 PWM current PWM current Oscillation Freq. 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 600 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 6 mA VDD=3V,VO=2.4V mA 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
8 mA 16 mA 240 mA 310 mA 2.05 2.12 MHz
VDD=3V, Temp.=25oC @Rosc = 220 Kohm Min : -3% Max : +3%
Ver: 1.8
8
October 14, 2009
SNC26500
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: 1.8
9
October 14, 2009
SNC26500
One Channel Speech Controller
8.2 Motor application
Separate CPU power path with power path of large current application
+
IO1 IO2
8050 8050
Battery Box
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 (10)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: 1.8
10
October 14, 2009
SNC26500
One 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: 1.8
11
October 14, 2009

▲Up To Search▲

Price & Availability of SNC26500

	To Download SNC26500 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .