1 What is the TWI Peripheral Library (PLIB) ?

The Two Wire Interface (TWI) bus, equivalent to Inter-Integrated Circuit (I²C) is a multi-host serial data communication bus useful for communicating with other peripherals or microcontroller devices. These peripheral devices may be serial EEPROMs, shift registers, display drivers, Analog-to-Digital (A/D) converters, Temperature and Humidity sensors, and so on.

The TWI interface supports the following operating modes:

• Host mode
• Client mode

The driver operation can be configured as:

• Polling
• Interrupt