Hello, sorry i don't speak very well English.

I have LCD2041, TTL and I2C MODE. J0 in, J1, J2, J3 OUT, adress i2c : 52H
To write to LCD i send:

Start 1 0 1 0 0 1 0 0 Ack 0 1 0 0 0 0 0 1 Ack Stop

To send A, but i have nothing on the display, and i have Ack error.

Can use i2c inferior has 100Kbs ...