YM2149 - Software-Controlled Sound Generator

I.

DA7 ~DAO This is an 8 bit bidirectional data bus which is used for moving data and addresses between the SSG and CPU.

In the read and write modes, DA7 ~ DAO corresponds to B7 ~ BO of the register array.

• 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 compatible level.
• Low power consumption (typical 125mW).
• 40 pin plastic O.