I2C bus, the controller transmits 8-bit data with the target receiving those 8-bits.
Modes of Operation:
#------------------------------------#
| i_read | Controller | Target |
|----------|-------------|-----------|
| 0 | Transmit | Receive |
| 1 | Receive | Transmit |
#------------------------------------#
Frequency of operation = 5 Mbps
References: