SNC26120

SNC26120 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: 1.7 1 October 14, 2009 SNC26120 One Channel Speech Controller AMENDENT HISTORY Version Ver 1.0 Ver 1.1 Ver 1.2 Ver 1.3 Ver 1.4 Date Nov. 6, 2008 Nov. 17, 2008 Jan. 7, 2009 Feb. 13, 2009 May 6, 2009 First issue Revise CVDD & VDDIO order of “Motor Application” Revise SRAM information 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 SNC26120 One Channel Speech Controller 1. INTRODUCTION SNC26120 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 SNC26120, 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 120 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. − Two 4-bit I/O ports P2 and P3 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) (64+16)*4 bits RAM are provided. (Notes : m0~m63 + 16 PWMIO duty registers) Maximum 64k program ROM is provided 248K*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. W atch Dog Timer Supported Ver: 1.7 3 October 14, 2009 SNC26120 One Channel Speech Controller 3. PIN ASSIGNMENT Symbol P10~P13 P20~P23 P30~P33 Rosc BUO1 BUO2 RST CVDD CGND VDDIO GNDIO Test I/O I 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 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 248K×12 bits Address Pointers/ STACK SRAM (64+16 nibbles) Timer ALU Timing Generator OSC Sampling Rate Counter W atch Dog Timer PWM Circuit Voice Synthesizer PWM IO Input port 1 IO port 2 IO port 3 Ver: 1.7 4 October 14, 2009 SNC26120 One Channel Speech Controller 5. FUNCTION DESCRIPTIONS 5.1 Oscillator SNC26120 accepts RC type oscillator for system clock. The typical circuit diagram for oscillator is listed as follows. VCC OSC RC Oscillator 5.2 ROM SNC26120 contains a substantial 248K words (12-bit) internal ROM, which is shared by program and resource data. Program, voice and data are shared within this same 248K words ROM. Ver: 1.7 5 r October 14, 2009 SNC26120 One Channel Speech Controller 5.3 RAM SNC26120 contains (64+16) nibble RAM . The 64 nibble RAM is only one page. Another 16 nibbles are 16 PWMIO duty registers. In our programming structure, user can Directly use memory related command, M0 ~ M63 in the data transfer type instructions, to access first 64 nibbles. Another 16 nibbles, user can use PWMxL, PWMxH related command to access when PWMIO function is disabled. (x can be 1~8) 5.4 Power Down Mode “End” instruction makes the IC entering into Stop Mode will stop the system clock for power savings (