46.6.5.3.3 Clock Stretching Sequence

If TWIHS_THR or TWIHS_RHR is not written/read in time, the TWIHS performs a clock stretching.

Clock stretching information is given by the SCLWS (Clock Wait State) bit.

See Clock Stretching in Read Mode and Clock Stretching in Write Mode.

Note: Clock stretching can be disabled by configuring the SCLWSDIS bit in TWIHS_SMR. In that case, the UNRE and OVRE flags indicate an underrun (when TWIHS_THR is not filled on time) or an overrun (when TWIHS_RHR is not read on time).