SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The transmit data-ready interrupt (XDATA) is generated if XDATA is 1 in the MCASP_TXSTAT register and XDATA is enabled in MCASP_EVTCTLX. The Section 26.6.4.10.1, Data Ready Status and Event/Interrupt Generation, provides details on when XDATA is set in the MCASP_TXSTAT register.
A transmit-start-of-frame interrupt (XSTAFRM) is triggered by the recognition of a transmit frame sync.
A transmit-last-slot interrupt (XLAST) is a qualified version of the data-ready interrupt (XDATA). It has the same behavior than the data-ready interrupt, but is further qualified by having the data requested belonging to the last slot (the slot that just ended is the next-to-last TDM slot, the current slot is the last slot).