TWIS — I2C compatible two-wire interface target with EasyDMA

The TWI target peripheral (TWIS) with EasyDMA provides a half duplex, two-wire synchronous serial communication interface.

The main features of TWIS are the following:

I²C compatible
Supports 100 kbps and 400 kbps bit rate
EasyDMA direct transfer to and from RAM
Individual selection of I/O pins
Support for clock stretching

TWI slave with EasyDMA — Figure 1. TWIS with EasyDMA

A typical TWI setup consists of one controller and one or more targets, as seen in the following figure. Only a single controller can be used on the TWI bus.

A typical TWI setup comprising one master and three slaves — Figure 2. Typical TWI setup with one controller and three targets