YM2149 - Software-Controlled Sound Generator
OF PINS 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.
In the address mode, DA3 ~ DAO is usde for the register address, and DA7 ~ DA4 is use
YAMAHK i.
s I YM2149 Software-Controlled Sound Generator (SSG) 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 microcomputer (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 generatio
YM2149 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
