SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
In FIFO polling mode (the I2C_IRQENABLE_SET[4] XRDY_IE and I2C_IRQENABLE_SET[3] RRDY_IE bits are disabled), the status of the module (receiver or transmitter) can be checked by polling the I2C_IRQSTATUS_RAW[4] XRDY and the I2C_IRQSTATUS_RAW[3] RRDY bits (the I2C_IRQSTATUS_RAW[13] RDR and I2C_IRQSTATUS_RAW[14] XDR bits can also be polled if the draining feature is enabled). The I2C_IRQSTATUS_RAW[4] XRDY and I2C_IRQSTATUS_RAW[3] RRDY bits accurately reflect the interrupt conditions described in the discussion of FIFO interrupt mode.