I am using the phytec board with infineon 509 microcontroller. I need to acess the on-board RTC via I2C, however the SDATA and SCLK pins are tied to port6.5 and port6.4 which are not bit addressable. How should I read data from SDATA and at the same write data out to SCLK without them interfering with each other? (I am adapting code from the Bit_Bang example).