SNC10A One Channel Direct Drive Speech Controller 1 INTRODUCTION SNC10A 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, two 4-bit I/O ports. By programming through the tiny controller in SNC10A, 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 – 5.1V 70 seconds voice capacity are provided(@6KHZ sample rate) Built in a 4-bit tiny controller One 4-bit input port, two 4-bit I/O ports are provided 64*4 bits RAM are provided 216K*10 ROM size are provided for voice data and program Maximum 16k program ROM is provided Built in a high quality speech synthesizer Adaptive playing speed from 2.5k-20kHz is provided One voice channel Built in a PWM Direct Drive circuit and a fixed current D/A output System clock : 2MHz Low Power Reset Ver: 1.3 1 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller 3 Block Diagram ROM Program/Speech 216K×10 bits Address Pointers/ STACK SRAM (64 nibbles) Timer ALU Input port 1 Timing Generator OSC Sampling Rate Counter PWM Voice Synthesizer D/A IO port 2 IO port 3 4 PIN ASSIGNMENT Symbol P13 ~ P10 P23 ~ P20 P33 ~ P30 VDD GND RST OSC BUO1/VO BUO2 Ver: 1.3 I/O I I/O I/O P P I I O O Function Description Bit3 ~ Bit0 of Input port 1 Bit3 ~ Bit0 of I/O port 2 Bit3 ~ Bit0 of I/O port 3 Positive power supply Negative power supply Reset pin (active high) Oscillator Input Positive Output of PWM or DA output Negative Output of PWM 2 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller 5 FUNCTION DESCRIPTIONS 5.1. Oscillator SNC10A accepts RC type oscillator for system clock. The typical circuit diagram for oscillator is listed as follows. VCC r OSC RC Oscillator 5.2. ROM SNC10A contains substantial 216K word (10-bit) internal ROM. Program, voices and other data are shared with this same 216K word ROM. 5.3. RAM SNC10A contains 64 nibble RAM. The 64 nibble RAM is divided into four pages (page 0 to page 3, 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 3) 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 will power down SNC10A and enable IC to consume fewer current for power saving. (<3uA @VDD=3V and <5uA @VDD=5V) Please be aware that when the power down mode is activated in SNC10A, any valid data transition (L H or H L) occurring on any input port (P1) or IO ports (P2 and P3) will lead SNC10A back to normal operation 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 feature makes voice close to its original source and yield the better voice quality. Ver: 1.3 3 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller 5.6. I/O Ports P1 is a 4-bit input port, P2 and P3 are two 4-bit I/O ports. Any bit of P2 and P3 can be programmed as either input or output port individually. Any valid data transition (H L or L H) of P1, P2 and P3 can reactivate the chip when the chip is in power-down mode. PAD To Internal Data Bus Read Control Weak Input Port Configuration (P10~P13) Port Data PAD Port Status Weak To Internal Data Bus Read Control I/O Port Configuration (P20~P23, P30~P33) Note: All weak N-MOS’s can serve as pull-low resistors. Ver: 1.3 4 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller 5.7. DAC & PWM SNC10A is an advanced chip to be designed having two optimal methods to play out the voices. One is DAC and the other is PWM. Upon user’s applications, user can select either DAC or PWM in his design. Please be aware that only one method can be activated at a time. DAC: A 7-bit current type digital-to-analog converter is built-in SNC10A. The relationship between input digital data and output analog current signal is listed in the following table. Also, the recommended application circuit is illustrated as follows. Input data 0 1 … N … 127 Typical value of output current (mA) 0 3/127 n*(3/127) 3 VCC BUO1/VO 1K DAC output Ver: 1.3 5 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller PWM: A PWM (pulse width modulation) circuit is built-in SNC10A. PWM can convert input digital data into pulse trains with suitable different pulse width. The maximum resolution of PWM is 7 bits. Two huge output stage circuits are designed in SNC10A. With this advanced circuit, the chip is capable of driving speaker directly without external transistors. The recommended application circuit is illustrated as follows. BUO1/VO BUO2 PWM Output Ver: 1.3 6 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller 6 ABSOLUTE MAXIMUM RATING Items Supply Voltage Input Voltage Operating Temperature Storage Temperature Symbol VDD-V VIN TOP TSTG Min -0.3 VSS-0.3 0 -55.0 Max 6.0 VDD+0.3 55.0 125.0 Unit. V V o C o C 7 ELECTRICAL CHARACTERISTICS Item Operating Voltage Standby current Operating Current Input current of P1, P2, P3 Drive current of P2, P3 Sink Current of P2, P3 Drive current of Buo1 Sink Current of Buo1 Sym. Min. Typ. Max. Unit Condition VDD 2.4 3.0 5.5 V ISBY 3.0 uA VDD=3V, no load IOPR 300 uA VDD=3V, no load IIH 3.0 10.0 uA VDD=3V,VIN=3V Drive Current of Buo2 Sink Current of Buo2 Oscillation Freq. Ver: 1.3 IOD - 4 - mA VDD=3V,VO=2.4V IOS - 6 - mA VDD=3V,VO=0.4V IOD IOS 100 100 120 120 - mA VDD=3V,Buo1=1.5V mA VDD=3V,Buo1=1.5V IOD IOS FOSC 100 100 - 120 120 2.0 - mA VDD=3V,Buo2=1.5V mA VDD=3V,Buo2=1.5V MHz VDD=3V 7 June 8, 2005 One Channel Direct Drive Speech Controller SNC10A 8 APPLICATION CIRCUIT VDD R VDD OSC RST P30 P31 P32 P33 VO1 SNC10A P10 P11 P12 P13 P20 P21 P22 P23 TR2 TR1 TR6 TR5 TR10 TR9 TR15 TR14 TR13 TR16 TR11 TR12 TR7 TR8 TR3 TR4 June 8, 2005 8 Ver: 1.3 VDD 8050 1K GND D/A Speaker Output 16 Scan Keys SNC10A One Channel Direct Drive Speech Controller 9 BONDING PAD (0.00,0.00) 6 7 8 10 11 NC NC NC NC NC NC NC NC NC NC VDD GND NC NC P33 P32 P31 P30 P23 P22 P21 12 RST GND BUO1 GND OSC 9 BUO2 1 2 3 4 5 VDD P10 P11 P12 P13 P20 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 Note: The substrate MUST be connected to Vss in PCB layout. Ver: 1.3 9 June 8, 2005 SNC10A One Channel Direct Drive Speech Controller AMENDMENT HISTORY Version Ver 1.3 Date June 8,2005 Description Modify Application circuit, remove the capacitor between RST and VDD Ver: 1.3 10 June 8, 2005 SNC10A One Channel Direct Drive 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: 1.3 11 June 8, 2005