SNC21120A

SNC21120A 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 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 WATCH DOG TIMER ................................................................................................... 6 PUSH-PULL OUTPUT................................................................................................... 7 EVENT MARK ............................................................................................................. 7 ABSOLUTE MAXIMUM RATING ............................................................................. 8 ELECTRICAL CHARACTERISTICS ........................................................................ 8 APPLICATION CIRCUIT ............................................................................................ 9 8.1 8.2 GENERAL APPLICATION .............................................................................................. 9 MOTOR APPLICATION ............................................................................................... 10 Ver1.1 1 April 28, 2009 SNC21120A 1-CH H.Q. Speech Controller AMENDENT HISTORY Version Ver1.0 Ver1.1 Date Description First issue. Revise system clock and electrical characteristics. April 24, 2009 April 28, 2009 Ver1.1 2 April 28, 2009 SNC21120A 1-CH H.Q. Speech Controller 1. INTRODUCTION SNC21120A 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 SNC21120A, 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 120 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. W ithout PWM IO 128*4 bits RAM are provided Maximum 16k program ROM is provided 384K*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. Event Mark function supported. Low-Voltage Detect circuit W atch Dog Timer Reset function. Ver1.1 3 April 28, 2009 SNC21120A 1-CH H.Q. Speech Controller 3. PIN ASSIGNMENT Symbol P10~P13 P20~P23 P30~P33 P60~P63 RST TEST OSC DAON DAOP VDDIO GNDIO VDD GND I/O I/O I/O I/O I/O I I I 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 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 IO port 6 Timer ALU IO port 1 IO port 2 IO port 3 Ver1.1 4 April 28, 2009 SNC21120A 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 SNC21120A contains a substantial maximum 384K words (10-bit) internal ROM, which is shared by program and resource data. Program, voice and data are shared within this same 384K words ROM. 5.3 RAM SNC21120A 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 (