SNC15168 One Channel Speech Controller ===================== CONTENTS ===================== 1. INTRODUCTION............................................................................................................3 2. FEATURES ......................................................................................................................3 3. PIN ASSIGNMENT.........................................................................................................3 4. BLOCK DIAGRAM ........................................................................................................4 5. FUNCTION DESCRIPTIONS .......................................................................................4 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 OSCILLATOR ...............................................................................................................4 ROM ..........................................................................................................................4 RAM ..........................................................................................................................5 POWER DOWN MODE ..................................................................................................5 SAMPLING RATE COUNTER .........................................................................................5 I/O PORTS ...................................................................................................................5 PWM OUTPUT ............................................................................................................6 WATCH DOG TIMER ....................................................................................................6 IR FUNCTION ..............................................................................................................6 6. ABSOLUTE MAXIMUM RATING ..............................................................................6 7. ELECTRICAL CHARACTERISTICS .........................................................................7 8. APPLICATION CIRCUIT .............................................................................................8 8.1 8.2 Ver: 1.5 GENERAL APPLICATION ...............................................................................................8 MOTOR APPLICATION ..................................................................................................9 1 October 30, 2008 SNC15168 One Channel Speech Controller AMENDENT HISTORY Version Date Description Ver 1.0 Oct 30, 2007 First issue Ver 1.1 May 28, 2008 Update Application Circuit Ver 1.2 June 10, 2008 Refine Application Circuit Ver 1.3 June 23, 2008 Refine Application Circuit Ver 1.4 August 25 2008 Refine Application Circuit Ver 1.5 October 30,2008 Refine Application Circuit Ver: 1.5 2 October 30, 2008 SNC15168 One Channel Speech Controller 1. INTRODUCTION SNC15168 is a one-channel voice synthesizer IC with PWM 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 SNC15168, 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 − Four 4-bit I/O ports P1, P2, P4 and P5 are provided. − The driving/sink current of P2 & P5 is up to 8mA/16mA − The IO pins P2.3 can be modulated with 38.5Khz carry signal to implement IR function. 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 Built in one channel speech synthesizer 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 3. PIN ASSIGNMENT Ver: 1.5 Symbol P10~P13 P20~P23 P40~P43 P50~P53 Rosc BUO1 I/O I/O I/O I/O I/O I O Function Description I/O port 1: IO I/O port 2: IO I/O port 4: IO I/O port 5: IO Oscillation component connection pin BUO2 O RST I PWM output 2 RST=1 Reset Chip (Active H) VDDIO GNDIO CVDD CGND Test I I I I I Positive power supply for I/O Negative power supply for I/O Positive power supply for internal core Negative power supply for internal core Test pin PWM output 1 3 October 30, 2008 SNC15168 One Channel Speech Controller 4. Block Diagram ROM Program/Speech 352K×12 bits Address Pointers/ STACK SRAM (128 nibbles) OSC Sampling Rate Counter Watch Dog Timer Voice Synthesizer PWM Circuit Timer ALU IO port 1 Timing Generator IO port 2 IO port 4 IO port 5 5. FUNCTION DESCRIPTIONS 5.1 Oscillator SNC15168 accepts RC type oscillator for system clock. The typical circuit diagram for oscillator is listed as follows. VCC OSC RC Oscillator 5.2 ROM SNC15168 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: 1.5 4 October 30, 2008 SNC15168 One Channel Speech Controller 5.3 RAM SNC15168 contains 128 nibble RAM (128 x 4-bits). The 128 nibble RAM is divided into two pages (page 0 to page 1, 64 nibble RAM on each page). In our programming structure, users can use the instructions, PAGE n (n=0 to 1) to switch and indicate the RAM page. Besides, users can use direct mode, M0 ~ M63 in the data transfer type instructions, to access all 64 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 (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 four 4-bit I/O ports P1, P2, P4, and P5. Any I/O can be individually programmed as either input pull low or output. Any valid data transition (H L or L H) of P1, P2, P4, and P5 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 & P5 is up to 8mA/16mA Ver: 1.5 5 October 30, 2008 SNC15168 One Channel Speech Controller 5.7 PWM Output An PWM circuit is built-in SNC15168. The maximum resolution of PWM is 8 bits. Two huge output stage circuits are designed in SNC15168. With this advanced circuit, the chip is capable of driving speaker directly without external transistors. BUO1 BUO2 PWM Output 5.8 Watch Dog Timer SNC15168 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 (1sec). 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. 6. ABSOLUTE MAXIMUM RATING Items Supply Voltage Input Voltage Operating Temperature Storage Temperature Ver: 1.5 Symbol VDD-V VIN TOP TSTG Min -0.3 VSS-0.3 0 -55.0 6 Max 6.0 VDD+0.3 55.0 125.0 Unit. V V o C o C October 30, 2008 SNC15168 One Channel Speech Controller 7. ELECTRICAL CHARACTERISTICS Item Operating Voltage Standby current Operating Current Input current of P1, P2, P4, P5 Drive current of P1, P4 Sink Current of P1, P4 Drive current of P2, P5 Sink current of P2, P5 PWM current PWM current Oscillation Freq. Ver: 1.5 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 3 4 - mA VDD=3V,VO=2.4V IOS 4 6 - mA VDD=3V,VO=0.4V IOD IOS IPP 6 10 - 8 16 120 - IPP - 150 - FOSC - 2.0 - 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. MHz VDD=3V 7 October 30, 2008 SNC15168 One Channel Speech Controller 8. APPLICATION Circuit 8.1 General application 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: 1.5 8 October 30, 2008 SNC15168 One Channel Speech Controller 8.2 Motor application There are some suggestions about PCB layout when user use SNC15000 series IC with motor applications. (1) The capacitor C1 C8 (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) C2 C3 C4 and C5 C6 C7 (104) are connected at the shell of motor, positive point and negative point of the motor. Ver: 1.5 9 October 30, 2008 SNC15168 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. 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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: 1.5 10 October 30, 2008