47.9.5.5.1 Read/Write Operation
A TWI high-speed frame always begins with the following sequence:
- START condition (S)
- Host Code (0000 1XXX)
- Not-acknowledge (NACK)
When the TWI is programmed in Client mode and TWI High-speed mode is activated, host code matching is activated and internal timings are set to match the TWI High-speed mode requirements.
