Paul__B:
Very peculiar datasheet indeed!Gives information about a number of versions of the display, and illustrates a peculiar pin numbering with the sequence 14 to 1, then 15 and 16 which may well be relevant to this whole discussion thread, but does not even illustrate the functions of the pins.
Peculiar indeed but it works when you read a bit further and maybe look at the pin definitions printed on the pcb another thing the pinouts on this screen is a bit different to the one on the original datasheet and it seems they changed it for some other reason than the actual pin functions but the pin functions remains the same just in another place
only thing that bothers me is that a I2C back pack doesn't work without a bit of cable in there