SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The host commands a receive channel teardown by writing the channel number to the CPDMA_RX_TEARDOWN register. When a teardown command is issued to an enabled receive 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 a 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.