Almost 2 years ago I was searching for any info's about M66003-xxxxFP (Matsushita Electric - Renesas) , driver/controller for VFD's, and nothing found. After 2 years i've finally managed to finish a guide ( datasheet) with all functional commands .
I hope to finish soon also the datasheet for M66005 .
M66003 can be found in several AV equipments from Yamaha and Panasonic, with large beautiful VFD's .
(brief preview in attachment)