MiSTer FPGA: Interface pinout - dwhinham/mt32-pi GitHub Wiki
Use this pinout if you'd like to build your own custom MiSTer interface.
- The leftmost five columns are for when constructing a USB cable to connect between the user port and a Raspberry Pi.
- If you want to connect a DE-10 Nano directly to a Raspberry Pi without an I/O board or USB cable, use the rightmost two columns and refer to your DE-10 Nano's manual for the pin positions.
- You can omit some of the connections if you don't want certain features. For example, if you don't want to use the MiSTer OSD integration, don't connect the I²C SDA and SCL signals. If you don't want to send audio back to the MiSTer for mixing, don't connect any of the I²S signals.
- You can connect a real SSD1306 OLED display too, if you'd like to have both a real display and make use of the OSD integration. Just connect your display as usual to the I²C SCL and SDA signals of both the Pi and the MiSTer.
| USB pin (user port) | USB signal name* | MiSTer signal name* | Wire color‡ | Raspberry Pi pin | DE-10 Nano Arduino pin§ |
|---|---|---|---|---|---|
| 1 | VBUS | +5V | 2† | VCC5 | |
| 2 | D- | TX (MIDI out) | 10 | SDA | |
| 3 | D+ | I²C SDA | 3 | SCL | |
| 4 | GND | GND | 6 | GND | |
| 5 | RX- | I²S DAT | 40 | D10/SS | |
| 6 | RX+ | I²S BCLK | 12 | D11/MOSI | |
| 7 | GND_DRAIN | I²C SCL | Bare wire | 5 | D12/MISO |
| 8 | TX- | I²S WS | 35 | D13/SCK | |
| 9 | TX+ | RX (MIDI in) | 8¶ | D8 |
Notes
- * Signal names are as seen from the MiSTer side (i.e. USB pin 2 is MIDI out FROM the MiSTer). The "USB signal name" is simply for cross-referencing the original purpose of the USB pin; the "MiSTer signal name" is what is actually being delivered on that pin.
- † Do not connect +5V if you want to use an external power supply for the Raspberry Pi.
- ‡ Wire colors for the RX and TX differential pairs could be swapped depending on which half of a cut USB cable you may be using.
- ¶ Optional, not currently used by mt32-pi.
- § This column is for connecting a DE-10 Nano directly to a Raspberry Pi. Refer to page 30 of the DE-10 Nano User Manual to locate the pin positions.