Lol, guilty - years ago I wrote a hardware manual / datasheet for a device with I2C interface. And I wrote yet another thorough I2C protocol section - and if I

Lol, guilty - years ago I wrote a hardware manual / datasheet for a device with I2C interface. And I wrote yet another thorough I2C protocol section - and if I recall, nobody in the documentation department specifically asked for it - but all the similar datasheets did it so why not us - probably explains a lot. Did the timing diagrams in xfig.