notes.txt

Yamaha MCR-33

Service manual is here
https://www.manualslib.com/download/1241537/Yamaha-Crx-330.html

Mounts Renesas M66003. Datasheet not available but M66004 is:
https://playground.arduino.cc/Main/M66004Vfd

Data is conveyed via SPI so should be fairly easy to snoop data and display it


Seven segment displays
-Use 4511 BCD driver
-Use Bangood 1737 four digit display drive via serial protocol	
-Use Adafruit HT16K33 four digit display driven via I2C. Suits common Anode
 displays https://www.adafruit.com/product/1427