SNC207S

SNC207S Direct Drive Speech Controller ================= CONTENTS ================ 1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 5.1. 5.2. 5.3. 5.4. 5.5. 5.6. 5.7. 5.8. 6. 6. 7. 7. 8. 8. INTRODUCTION........................................................................................................2 FEATURES ..................................................................................................................2 BLOCK DIAGRAM ....................................................................................................3 PIN ASSIGNMENT.....................................................................................................3 FUNCTION DESCRIPTIONS ...................................................................................4 OSCILLATOR ...............................................................................................................4 ROM ..........................................................................................................................4 RAM ..........................................................................................................................4 POWER DOWN MODE ..................................................................................................4 SAMPLING RATE COUNTERS .......................................................................................4 EVENT MARK ..............................................................................................................5 I/O PORTS ...................................................................................................................5 DAC & PWM.............................................................................................................6 ABSOLUTE MAXIMUM RATING ..........................................................................8 ELECTRICAL CHARACTERISTICS .....................................................................8 APPLICATION CIRCUIT .........................................................................................9 DISCLAIMER .....................................................................................................................11 Ver: 0.3 1 Sept 20, 2007 SNC207S Direct Drive Speech Controller 1. 1. INTRODUCTION SNC207S is a single channel voice synthesizer IC with PWM direct drive circuit. It built-in a 4-bit tiny controller with six I/O pins. By programming through the tiny controller in SNC207S, user’s varied applications including voice section combination, key trigger arrangement, output control, and other logic functions can be easily implemented. 2. 2. FEATURES Single power supply 2.4V – 5.5V 30 seconds voice capacity are provided (@6KHZ sample rate) Built in a 4-bit tiny controller W here P3.2, P3.3 can direct drive LED (8mA for driving, 16mA for sink) Six I/O pins are provided (P3.0~P3.3, P2.0, P2.1) 48*4 bits RAM are provided 96K*10 ROM size are provided for voice data and program Maximum 16K program ROM is provided Readable ROM code data Built in a high quality speech synthesizer Adaptive playing speed from 2.5k-20kHz is provided Built in a PWM Direct Drive circuit and a fixed current D/A output 8-level volume control for PWM Direct Drive output System clock: 2MHz Low Power Detect Ver: 0.3 2 Sept 20, 2007 SNC207S Direct Drive Speech Controller 3. 3. Block Diagram ROM Program/Speech 96K×10 bits Timing Generator Address Pointers/ STACK SRAM (48 nibbles) Timer ALU IO3 / IO2 OSC Sampling Rate Counter Voice Synthesizer PWM D/A 4. 4. PIN ASSIGNMENT Symbol P33 ~ P30 P21 ~ P20 VDD GND RST OSC BUO1/VO BUO2 Fuse I/O I/O I/O P P I O O O I Function Description Bit3 ~ Bit0 of I/O port 3 Bit1 ~ Bit0 of I/O port 2 Positive power supply Negative power supply Reset pin (active high) Oscillator / Crystal Out Positive Output of PWM or DA output Negative Output of PWM For test mode Ver: 0.3 3 Sept 20, 2007 SNC207S Direct Drive Speech Controller 5. 5. FUNCTION DESCRIPTIONS 5.1. Oscillator SNC207S accept RC type oscillator for system clock. The typical circuit diagram for oscillator is listed as follow. VCC OSC RC Oscillator 5.2. ROM SNC207S contains substantial 96K words (10-bit) internal ROM. Program, voices and other data are shared with this same 96K words ROM. 5.3. RAM SNC207S contains 48 nibbles RAM. The 48 nibbles RAM are divided into three pages (page 0, page 1 and page 2, 16 nibble RAM on each page). In our programming structure, users can easily define and locate RAM page in the program. For instance, users can use the instructions, PAGEn (n=0 to 2) to switch and indicate the RAM page. Besides, users can use direct mode, M0 ~ M15 in the data transfer type instructions (M15 is forbidden using for user in each page), to access all 16 nibbles of each page. 5.4. Power Down Mode “End” instruction will power down SNC207S and enable IC to consume fewer current for power saving. (