774 YM2413 FM synthesis audio chip
774 : YM2413 FM synthesis audio chip
- Author: Sehyeon Kim, IKA Microelectronics Inc. & Renaldas Zioma (TT/ASIC)
- Description: The YM2413 is the OPL (FM Operator Type-L) series FM synthesis audio chip built using IKA OPLL core implementation.
- GitHub repository
- Open in 3D viewer
- Clock: 3579545 Hz
How it works
TODO, but meanwhile see https://github.com/ika-musume/IKAOPLL/blob/main/README.md
External hardware
Use either a) Audio PMOD on BIRIDIRECTIONAL pins b) R2D DAC on OUTPUT pins
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | D0 data bus | DAC output *(LSB)* | (in) **A0** register latch |
| 1 | D1 data bus | DAC output | (in) **/CS** chip select *(active low)* |
| 2 | D2 data bus | DAC output | (in) **/WR** write *(active low)* |
| 3 | D3 data bus | DAC output | |
| 4 | D4 data bus | DAC output | |
| 5 | D5 data bus | DAC output | |
| 6 | D6 data bus | DAC output | |
| 7 | D7 data bus | DAC output *(MSB)* | (out) PWM output *(Audio PMOD compatible)* |