27.2.1 TWI Terminology

The following definitions are frequently encountered in this section.

Table 27-1. TWI Terminology
TermDescription
MasterThe device that initiates and terminates a transmission. The Master also generates the SCL clock.
SlaveThe device addressed by a Master.
TransmitterThe device placing data on the bus.
ReceiverThe device reading data from the bus.

This device has one instance of TWI. For this reason, the instance index n is omitted.

The Power Reduction TWI bit in the Power Reduction Register (PRRn.PRTWI) must be written to '0' to enable the two-wire Serial Interface.

TWI0 is in PRR.