Load this example text file using the Universal Expert Mode menu in
Win-I2CNT(v4) or Win-I2CUSB to view the GUI format.
 

Message #1: Example of a device with address 0x2A8
and writing 0x10 to subaddress 0x23:

F4,Write,Yes,0,A8,23,10
 

Messages #2 & 3: Example reading  8 bytes from device address 0x2A8:

F4,Write,No,0,A8
F4,Read,Yes,0,FF,FF,FF,FF,FF,FF,FF,FF
 

The "x2" portion of the address corresponds to "F4" (1111 010x)
in the reserved format  for 10-bit addressing (1111 xxx-).
Refer to the Philips I2C bus specification for additional details.