Clock Stretching in Read Mode

The clock is tied low if the internal shifter is empty and if a STOP or REPEATED START condition was not detected. It is tied low until the internal shifter is loaded.

The figure below describes the clock stretching in Read mode.

Figure 46-34. Clock Stretching in Read Mode
Note:
  1. TXRDY is reset when data has been written in TWIHS_THR to the internal shifter and set when this data has been acknowledged or non acknowledged.
  2. At the end of the read sequence, TXCOMP is set after a STOP or after a REPEATED_START + an address different from SADR.
  3. SCLWS is automatically set when the clock stretching mechanism is started.