SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The host commands a transmit channel teardown by writing the channel number to the CPDMA_TX_TEARDOWN register. When a teardown command is issued to an enabled transmit channel the following will occur:
Channel teardown may be commanded on any channel at any time. The host is informed of the teardown completion by the set teardown complete buffer descriptor bit. The port does not clear any channel enables due to a teardown command. A teardown command to an inactive channel issues an interrupt that software should acknowledge with a FFFF FFFCh acknowledge value (note that there is no buffer descriptor in this case). Software may read the interrupt acknowledge location to determine if the interrupt was due to a commanded teardown. The read value will be FFFF FFFCh if the interrupt was due to a teardown command.