Vladimir:
You could do this with software bit banged slave mode I2C port. The design of the I2C bus is done so that the two lines of the interface operate in a wired OR manner. If you need to slow down the interface a bit to let your uCtlr keep up you should be able to glom onto and hold down the appropriate line and effectively putting wait states on to the I2C bus. Note however that some master mode drivers are not written in a robust enough manner in order to permit this to work so use caution. You can go to the Philips WEB site and locate the I2C specification. The bus holding logic is described in the Philips specification. Philips also has a part that is a I2C bus master part with a host side parallel port. The data sheet for this part also describes the same subject. Going by memory I think the part number of this device is PFC8584. ((I would not use the part in a real design however. I used it once in a video conferencing system I designed and we found the part to not work correctly under all conditions. The state machine in the part gets screwed up if there is even a little bit of digital noise on the interface lines into the part.))
Michael Karas