SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
Packet transmission is accomplished within the UDMA by moving data from structures that are located in memory via the VBUSM Memory Interface(s) onto the Transmit PSI-L Interface. On the Tx side of the UDMA, these transfers are always reads. Data is read from an attached memory mapped space and packed into the Rx Per Channel Buffer for that channel. At a later time, the data is moved from the Tx Per Channel FIFO to a remote peer DMA entity via the Tx PSI-L interface.