SNC21268A

SNC21268A 1-CH H.Q. 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 5.11 5.12 6. 7. 8. OSCILLATOR .............................................................................................................. 5 ROM ......................................................................................................................... 5 RAM ......................................................................................................................... 5 POWER DOWN MODE ................................................................................................. 5 SAMPLING RATE COUNTER ........................................................................................ 5 AUTO REPEAT FUNCTION ........................................................................................... 5 I/O PORTS .................................................................................................................. 5 IR FUNCTION ............................................................................................................. 6 PWM IO CONTROL .................................................................................................... 6 WATCH DOG TIMER ................................................................................................... 6 PUSH-PULL DAC & CURRENT DA OUTPUT ............................................................... 7 EVENT MARK ............................................................................................................. 8 ABSOLUTE MAXIMUM RATING ............................................................................. 9 ELECTRICAL CHARACTERISTICS ........................................................................ 9 APPLICATION CIRCUIT .......................................................................................... 10 8.1 8.2 GENERAL APPLICATION ............................................................................................ 10 MOTOR APPLICATION ............................................................................................... 11 Ver1.1 1 November 6, 2009 SNC21268A 1-CH H.Q. Speech Controller AMENDENT HISTORY Version Ver1.0 Ver1.1 Date Description September 4, 2009 First issue. November 6, 2009 1. Add Current DAC description in page7 Ver1.1 2 November 6, 2009 SNC21268A 1-CH H.Q. Speech Controller 1. INTRODUCTION SNC21268A is a one-channel voice synthesizer IC with Push-Pull 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 SNC21268A, 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 System Clock is 2MHz, the instruction cycle is 4us 268 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, P3 and P6 are provided The driving/sink current of P3.2 & P3.3 is up to 8mA/16mA The IO pins P3.3 or P2.3 can be modulated with 38.5KHz carry signal to implement IR function. 6 PWM output for IO (P3.0~P3.3 & P6.0~P6.1) 128*4 bits RAM are provided Maximum 16k program ROM is provided 816K*10 shared ROM for voice data and program Readable ROM code data Built-in one channel High Quality speech synthesizer Adaptive playing speed from 2.5k-20kHz is provided Automatic repetition Support 5-bit ADPCM and 10 bit PCM format. Built in an 8-level volume control Push-Pull DAC circuit output, can directly connected to Speaker for sound output. 12 bit Push-Pull DA output and 12 bit current DAC output Event Mark function supported. Low-Voltage Detect circuit W atch Dog Timer Reset function. Ver1.1 3 November 6, 2009 SNC21268A 1-CH H.Q. Speech Controller 3. PIN ASSIGNMENT Symbol P10~P13 P20~P23 P30~P33 P60~P63 RST TEST OSC DAON DAOP DACO VDDIO GNDIO VDD GND I/O I/O I/O I/O I/O I I I O O O I I I I Function Description I/O port 1: IO I/O port 2: IO I/O port 3: IO I/O port 6: IO Reset Chip (Active H) Test Pin Oscillation component connection pin Push-Pull output 1 Push-Pull output 2 Current DAC output Positive power supply Negative power supply Positive power supply Negative power supply 4. Block Diagram ROM Program/Speech Address Pointers/ STACK SRAM (128 nibbles) Timing Generator OSC Sampling Rate Counter W atch Dog Timer Voice Synthesizer Push-Pull Circuit Current DAC Circuit IO port 3 IO port 6 Timer ALU PWM IO IO port 1 IO port 2 Ver1.1 4 November 6, 2009 SNC21268A 1-CH H.Q. Speech Controller 5. FUNCTION DESCRIPTIONS 5.1 Oscillator System clock define 2MHz, the source provided by external resistor ring oscillator. 5.2 ROM SNC21268A contains a substantial maximum 816K words (10-bit) internal ROM, which is shared by program and resource data. Program, voice and data are shared within this same 816K words ROM. 5.3 RAM SNC21268A contains maximum 128 nibble RAM (128 x 4-bits). The 128 nibble RAM is divided into eight pages (page 0 to page 7, 16 nibble RAM on each page). In our programming structure, users can use the instructions, PAGE n (n=0 to 7) 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 makes the IC entering into Stop Mode will stop the system clock for power savings (