Hi again,
made some test and found that the time counter of the MCU don’t support any MTC or MMC protocol.
But i found a way to display numbers on it by sending midi messages (not sysex).
The thing is i don’t have any idea how it can be possible to link MMC/MTC messages to those specific midi messages i found.
I may need some help from someone who had this knowledge.
Maybe Danoise ? 
Here is what i found:
The MCU time counter is a succession of 10 digits. And the assignment zone is 2 digits.
If i send message “B0 40 31” --> displays “1” on last time counter digit (digit 10)
If i send message “B0 40 32” --> displays “2” on last time counter digit (digit 10)
…etc
If i send message “B0 41 31” --> displays “1” on time counter digit 9.
…etc
If i send message “B0 49 31” --> displays “1” on time counter digit 1.
…etc
If i send message “B0 4A 31” --> displays “1” on assignment digit 2.
If i send message "B0 4B 31é --> displays “1” on assignment digit 1.
So please folks i any of you got an idea how to send midi messages in real time according to song position and/or song timing, let me know so i can finish the complete support for the MCU.
Any tip is welcome!
Thanks!!