SNC688

SNC688 4-Channel Speech Controller ======== 1. 2. 3. 4. 5. 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 6. 7. 8. 9. 10. CONTENTS ======== INTRODUCTION ............................................................................................................... 3 FEATURES ....................................................................................................................... 3 BLOCK DIAGRAM ........................................................................................................... 4 PIN ASSIGNMENT ........................................................................................................... 4 FUNCTION DESCRIPTIONS ............................................................................................ 5 OSCILLATOR ................................................................................................................... 5 ROM .............................................................................................................................. 5 RAM .............................................................................................................................. 5 POWER DOWN MODE ...................................................................................................... 5 SAMPLING RATE COUNTERS ............................................................................................ 5 AUTO REPETITION ........................................................................................................... 6 I/O PORTS ...................................................................................................................... 6 IR FUNCTION .................................................................................................................. 7 8-BIT DAC ...................................................................................................................... 7 8-BIT PWM ..................................................................................................................... 8 ABSOLUTE MAXIMUM RATING ..................................................................................... 9 ELECTRICAL CHARACTERISTICS ................................................................................ 9 ROSC PERFORMANCE ................................................................................................. 10 APPLICATION CIRCUIT ................................................................................................ 11 BONDING PAD........................................................................................................... 13 Ver: 1.3 1 June 8, 2005 SNC688 4-Channel Speech Controller AMENDENT HISTORY Version Date Ver 1.1 Ver 1.2 April 24, 2003 August 26, 2003 Description First issue 2. FEATURES : Modify Power supply is 2.4~5.5V 5. FUNCTION Description 5.1 Oscillator : Modify ROSC R=100KΩ 7. Electrical Characteristic : Add Current (ROSC&XTAL Mode), and Operating Voltage Max = 5.5V 8. ROSC Performance : Add ROSC Performance 9. Application Circuit : Add Note about C1 close to VDD pin of Chip Ver 1.3 June 8,2005 Modify Application circuit, remove the capacitor between RST and VDD Ver: 1.3 2 June 8, 2005 SNC688 4-Channel Speech Controller 1. INTRODUCTION SNC688 is a 61 seconds single chip 4-channel voice synthesizer IC which contains 24 I/O pins and a tiny controller. By programming through the tiny controller, users’ applications including section combination, trigger modes, output status, high performance melody, multiple voices, and other logic functions can be implemented. 2. FEATURES Single power supply 2.4V – 5.5V Built in a tiny controller 61 seconds voice capacity are provided Six 4-bit I/O ports are provided 256*4 bits RAM are provided Maximum 64k program ROM is provided 184K *12 ROM size is provided for voice data and program Readable ROM code data Built in a high quality speech synthesizer Four independent voice channels Adaptive playing speed from 4k-40kHz is provided for all 4 channels individually Automatic repetition for every channel A 6-bit*8-bit Multiplier is embed to modulate the volume of synthesized voices Two digital mixers (with saturation control) are provided Built in a PWM Direct Drive circuit and a current output DA converters. Built in 15 levels PWM output volume control. System clock: 8M Hz ( RC-type or Crystal Option) Low Voltage Reset Ver: 1.3 3 June 8, 2005 SNC688 4-Channel Speech Controller 3. Block Diagram ROM Program/Speech/Melody/Instrument waveform 184K ×12 bits Address Pointers/ STACK SRAM (256 nibbles) Sampling Rate Counter × 4 Timing Generator OSC Volume Control PWM 8bit D/A IO1 IO2 Timer ALU IO3 IO4 Voice Synthesizer IO5 IO6 4. PIN ASSIGNMENT Symbol P13 ~ P10 P23 ~ P20 P33 ~ P30 P43 ~ P40 P53 ~ P50 P63 ~ P60 VDD GND XIN RST XOUT/OSC CKSEL I/O I/O I/O I/O I/O I/O I/O P P I I O I Function Description Bit3 ~ Bit0 of I/O port 1 Bit3 ~ Bit0 of I/O port 2 Bit3 ~ Bit0 of I/O port 3 Bit3 ~ Bit0 of I/O port 4 Bit3 ~ Bit0 of I/O port 5 Bit3 ~ Bit0 of I/O port 6 Positive power supply Negative power supply Crystal In Chip Reset (Active high) Crystal Out / Rosc In Clock type select (Internal pull low) ‘L’ or floating → RC oscillator ‘H’ →Crystal Positive Output of PWM or DA1 Negative Output of PWM or DA2 BUO1/VO1 BUO2/VO2 O O Ver: 1.3 4 June 8, 2005 SNC688 4-Channel Speech Controller 5. FUNCTION DESCRIPTIONS 5.1 Oscillator SNC688 accepts crystal oscillator / ceramic resonator or RC type oscillator (selected by pin CKSEL) for system clock. The typical circuit diagrams for oscillator are listed as follows. VD D S NC 6 8 8 15 p F S NC 6 8 8 8MH Z C KS E L XO U T /R O S C XIN CKS E L XO U T /R O S C XIN 10 0 K 8MHZ Crystal 15 p F 8M Rosc 5.2 ROM SNC688 contains 184K words (12-bit) internal ROM. Program, voices, melodies, data, and instrument waveforms share the same ROM with the others. 5.3 RAM SNC688 contains 256 nibble RAM. The 256 nibble RAM is separated into four pages (page 0, page1, page2 and page 3). An implicit page indicator is utilized to specify page address. Four instructions, PAGE0, PAGE1, PAGE2 and PAGE3, can switch the page indicator. All 64 nibbles of each page can be accessed by direct mode (to specify M0 ~ M63 in the data transfer type instructions.) 5.4 Power Down Mode “End” instruction will let SNC688 enter power down mode and consumer very little amount of current. (