YM2149 Datasheet | Yamaha

OVERVIEW The SSG (Software-Controlled Sound Generator) is an NMOS-LSI device designed to be capable of music generation. It only requires the microprocessor or microputer (CPU) to initialize its register array, thus reducing the load on the CPU. Music generation is carried out by the three sequence square wave generator, noise generator, and envelope generator according to the set parameters. This allows for the generation of music, special effects, warnings, and various other types of sounds. - FEATURES - 5V single power supply - Easy connection to 8 bit or 16 bit CPU - Simple connection to external system through 2 sequence 8 bit 1/0 port - Wide voicing range of 8 octaves - Smooth attenuation by 5 bit envelope generator - Built-in 5 bit D/A convertor - Input of double frequency clock can be handled by built-in clock frequency divider - TTL patible level - Low power consumption (typical 125m W) - 40 pin plastic OIL package - Pin patible with AY-3-8910 manuafactured by GI ------YAMAHA CORPORATION----v M2149 CATALOG CATALOG No.: LSl-2121492 1992.9 - PIN LAYOUT Vss(GND) N .C ANALOG CHANNEL B ANALOG CHANNEL A N.C s IOB7 IOB6 !OBS s IOB4 IOB3 10 IOB2 11 !OBI 12 IOBO 13 IOA7 14 IOA6 15 !OAS 16 IOA4 17 IOA3 IS IOA2 19 IOAI 20 40 Vcc( + SV) 39 TEST! 3S ANALOG CHANNEL C 37 DAO 36 DAI 3S DA2 34 DA3 33 DA4 32 DAS 31 DA6 30 DA7 29 BC! 2S BC2 27 BDIR 26 SEL 25 AS 24 A9 23 RESET 22 CLOCK 21...