SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Poll the I2Cn_ICSTR[4] I2C Interrupt Status register ICXRDY bit, or use the XRDY interrupt (I2Cn_ICIVR[2:0] I2C Interrupt Vector register INTCODE = 0b101) to transmit data from the I2Cn_ICDXR I2C Data Transmit register. If the DMA is enabled, there are no I2C-specific registers for monitoring DMA activity.
In transmit mode only, the I2Cn_ICSTR[10] XSMT bit indicates whether the transmitter has experienced underflow. Underflow occurs when the shift register is empty and the I2Cn_ICDXR register has not been loaded.