SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
This only applies to interrupts and not to DMA requests. The following terms are defined:
The first interrupt request to become active for the serializer with the interrupt flag set in MCASP_TXSTAT/MCASP_RXSTAT and the interrupt enabled in MCASP_EVTCTLX/MCASP_EVTCTLR generates a request on the McASP transmit or receive interrupt port.
If more than one interrupt request becomes active in the same cycle, a single interrupt request is generated on the McASP transmit or receive interrupt port. Subsequent interrupt requests that become active while the first interrupt request is outstanding do not immediately generate a new request pulse on the McASP transmit or receive interrupt port.
The interrupt is serviced with the CPU writing to MCASP_TXSTAT/MCASP_RXSTAT. If any interrupt requests are active after the write, a new request is generated on the McASP transmit or receive interrupt port.
One outstanding interrupt request is allowed on each port, so a transmit and a receive interrupt request may both be outstanding at the same time.