4.6.6 Connecting to the I²C Interface

Four different FLEXCOM interfaces, with seven possible configurations (configured in TWI mode), and one pure TWI Interface are available on the ATSAMA5D27-WLSOM1 module.

The Flexible Serial Communication Controller (FLEXCOM) offers several serial communication protocols that are managed by the three submodules USART, SPI, and TWI.

The Two-wire Interface (TWI) interconnects components on a unique two-wire bus, made up of one clock line and one data line with speeds of up to 400 kbit/s in Fast mode and up to 3.4 Mbit/s in High-Speed Client mode only, based on a byte-oriented transfer format.

It can be used with any Two-wire Interface bus Serial EEPROM and I²C-compatible devices, such as a Real-Time Clock (RTC), Dot Matrix/Graphic LCD Controller and temperature sensor. The TWI is programmable as a host or a client with sequential or single-byte access. Multiple host capability is supported.