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https://github.com/anachrocomputer/playymztune

Arduino sketch to play a tune on the YMZ284 Programmable Sound Generator
https://github.com/anachrocomputer/playymztune

arduino arduino-sketch psg ymz284

Last synced: 5 days ago
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Arduino sketch to play a tune on the YMZ284 Programmable Sound Generator

Host: GitHub
URL: https://github.com/anachrocomputer/playymztune
Owner: anachrocomputer
Created: 2024-03-15T22:23:36.000Z (10 months ago)
Default Branch: main
Last Pushed: 2024-03-16T14:20:16.000Z (10 months ago)
Last Synced: 2024-12-06T19:58:03.716Z (about 2 months ago)
Topics: arduino, arduino-sketch, psg, ymz284
Language: C++
Homepage:
Size: 35.2 KB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md

Awesome Lists containing this project

README

        # playYMZtune #

The Yamaha YMZ284 is a 16-pin chip which has the same function and register-level interface as the General Instruments

[AY-3-8910](https://en.wikipedia.org/wiki/General_Instrument_AY-3-8910 "Wikipedia: General Instrument AY-3-8910").

The YMZ284, though, is smaller and has a simpler bus interface.

Unlike the AY-3-8910, it is write-only; register contents may not be read back.

This Arduino sketch uses a YMZ284 chip to play a short tune.

The ATmega328 on the Arduino is set up to generate a 2MHz clock on Arduino Pin 3

(ATmega328 Pin 5).

This is the 16MHz Arduino clock frequency divided by 8.

## Connections ##

| Signal 
|:-------|:- 
| RxD    | 0 
| TxD    | 1 
| CS     | 2 
| CLK    | 3 
| WR     | 4 
| A0     | 5 
| D0     | 6 
| D1     | 7 
| D2     | 8 
| D3     | 9 
| D4     | 10 
| D5     | 11 
| D6     | 12 
| D7     | 13 
|        | 
|        | 
| Vdd    | 5V 
| Gnd    | Gnd

| Arduino Pin | ATmega328 Pin | YMZ284 Pin | Notes                        | -----------|:--------------|:-----------|:-----------------------------| | PORTD0 pin 2  |            | Unused                       | | PORTD1 pin 3  |            | Unused                       | | PORTD2 pin 4  | /CS pin 2  | Chip Select, active LOW      | | PORTD3 pin 5  | ΦM pin 7   | Main clock, 2MHz             | | PORTD4 pin 6  | /WR pin 1  | Write Enable, active LOW     | | PORTD5 pin 11 | A0 pin 3   | Address/Data Select          | | PORTD6 pin 12 | D0 pin 16  | CPU interface data bus (LSB) | | PORTD7 pin 13 | D1 pin 15  | CPU interface data bus       | | PORTB0 pin 14 | D2 pin 14  | CPU interface data bus       | | PORTB1 pin 15 | D3 pin 13  | CPU interface data bus       | | PORTB2 pin 16 | D4 pin 12  | CPU interface data bus       | | PORTB3 pin 17 | D5 pin 11  | CPU interface data bus       | | PORTB4 pin 18 | D6 pin 10  | CPU interface data bus       | | PORTB5 pin 19 | D7 pin 9   | CPU interface data bus (MSB) | |               | /IC pin 8  | Initial Clear, active LOW    | |               | SO pin 5   | D/A Converter Output (sound) | | VCC pin 7/21  | VDD pin 4  | +5V Power Supply             | | GND pin 8/22  | GND pin 6  | Ground                       |

## YMZ284 Chip ##

![YMZ284 chip](YMZ284.jpg "YMZ284 chip")