45.6.6.8.1 TXRDY and RXRDY Configuration

In Multiple Data mode, it is possible to write one or more data in the same TWIHS_THR/TWIHS_RHR access. The TXRDY flag indicates if one or more data can be written in the FIFO depending on the configuration of TWIHS_FMR.TXRDYM/RXRDYM.

As an example, if two data are written each time in TWIHS_THR, it is useful to configure the TXRDYM field to the value ‘1’ so that the TXRDY flag is at ‘1’ only when at least two data can be written in the Transmit FIFO.

In the same way, if four data are read each time in TWIHS_RHR, it is useful to configure the RXRDYM field to the value ‘2’ so that the RXRDY flag is at ‘1’ only when at least four unread data are in the Receive FIFO.