42.7.1 Transfer Format

The data put on the TWD line must be 8 bits long. Data is transferred MSB first; each byte must be followed by an acknowledgement. The number of bytes per transfer is unlimited, shown in Transfer Format.

Each transfer begins with a START condition and terminates with a STOP condition, as shown in Figure 42-2.

  • A high-to-low transition on the TWD line while TWCK is high defines the START condition.
  • A low-to-high transition on the TWD line while TWCK is high defines the STOP condition.
Figure 42-2. START and STOP Conditions
Figure 42-3. Transfer Format