SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
DMA functionality is enabled/disabled by the CPU with SET_TX_DMA/CLR_TX_DMA bits, respectively.
In multibuffered SCI mode once TXRDY bit is set or after a transmission of programmed number of characters (LENGTH) (up to eight data bytes stored in the transmit buffers (TDy) in the LINTD0 and LINTD1 registers), a DMA request is generated to reload the transmit buffer for the next transmission. If the multibuffer option is disabled, then DMA requests are generated on a byte-per-byte basis.