42.7.4.2.1 TWIHS as Host Only

In this mode, the TWIHS is considered as a Host only (MSEN is always at one) and must be driven like a Host with the ARBLST (Arbitration Lost) flag in addition.

If arbitration is lost (ARBLST = 1), the user must reinitiate the data transfer.

If starting a transfer (ex.: DADR + START + W + Write in THR) and if the bus is busy, the TWIHS automatically waits for a STOP condition on the bus to initiate the transfer (see User Sends Data While the Bus is Busy).